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01 / 05
Centers of Progress, Pt. 15: Mainz (Printing Press)

Blog Post | Innovation

Centers of Progress, Pt. 15: Mainz (Printing Press)

Mainz, the city that was crucial to Europe's rapid adoption of the printing press, effectively democratized the spread of information.

Today marks the fifteenth installment in a series of articles by HumanProgress.org called Centers of Progress. Where does progress happen? The story of civilization is in many ways the story of the city. It is the city that has helped to create and define the modern world. This bi-weekly column will give a short overview of urban centers that were the sites of pivotal advances in culture, economics, politics, technology, etc.

Our fifteenth Center of Progress is Mainz, the hometown of the man who invented the metal movable-type printing press, Johannes Gutenberg (circa 1399–1468), and the urban base from which that invention spread throughout Europe. While he may have technically invented the printing press in Strasbourg, Gutenberg soon returned to Mainz, and it was in the latter city that he taught many others the art of printmaking. Political turmoil in the city soon caused a mass exodus of Gutenberg’s apprentices. The printmakers spread out from Mainz to different corners of Europe, where they further disseminated printmaking knowledge. The Mainz printmaker diaspora helped increase the speed with which other parts of Europe adopted the printing press.

Today, Mainz is the capital and biggest city of Rhineland-Palatinate, a state in western Germany. The city is known for its wine production and beautiful reconstructed half-timbered houses, and its market squares’ medieval architecture. It is also a carnival stronghold: every February, during Ash Wednesday and Shrove Tuesday, the city brims with parades and music. Located on the Rhine River banks, Mainz also houses a beautiful cathedral dating back to 975 AD, as well as the Gutenberg Museum. The museum, devoted to the history of printing, was founded in 1900 AD and contains two original 15th-century Gutenberg Bibles. The city’s industries are varied and include chemical and pharmaceutical products, electronics, precision instruments, machinery, glassware, and musical instruments. Appropriately, given its history, Mainz also remains an important media center, with publishing houses as well as radio and television studios. The city also honors its most famous resident with a festival in his honor each summer, called Johannisnacht.

The Romans founded Mainz at the site of a preexisting Celtic settlement in the 1st century BC, establishing it as a military fortress outpost or castrum on their empire’s northern frontier. They named the outpost Moguntiacum, after the local Celtic deity Mogo or Mogons, likely a god of battle. The Latin name Moguntiacum eventually evolved into the German name Mainz that the city bears to this day. The Romans introduced wine-growing to the area, which remains a key local industry. The Roman conquerors also brought the Latin writing system with them—a writing system with a limited alphabet that, as we shall see, likely bolstered the eventual success of the printing press. Mainz also served as a provincial capital of the territory that the Romans called Germania Superior.

Mainz again rose to political prominence in the 9th century AD when it began to serve as the capital of the Electorate of Mainz in the Holy Roman Empire. The Holy Roman Empire was a political institution that, for centuries, united different constituent territories or kingdoms in central and western Europe in something more akin to a confederation than a true empire. Constituent principalities had their own rulers and enjoyed relative independence. The Encyclopedia Britannica calls the Holy Roman Empire, “along with the papacy, the most important institution of western Europe” during the middle ages. And the Electorate of Mainz is widely regarded as having been one of the most prestigious and influential states within the Holy Roman Empire. Mainz was the seat of the Archbishop-Elector of Mainz, the Primate of Germany. (The Primate of Germany was a historical title given to the most powerful bishop in the German-speaking areas of Europe). This archbishop acted as the archchancellor of Germany, one of the constituent kingdoms of the Holy Roman Empire, and was second in power only to the Holy Roman Emperor.

In other words, by the time that Gutenberg was born in a house situated on a corner in Christofsstraße in Mainz, in the late 14th century AD—the spot is now marked by a commemorative plaque—the city was a well-established center of political importance. But the city was deeply unstable, wracked by internal disputes and economic turmoil.

Tensions between the city’s patricians or nobility and the fast-growing merchant class were palpable throughout Mainz. In 1332, to quell a brief civil war, the Archbishop of Mainz granted the guilds representing merchants and craftsmen equal representation on the city council alongside the old nobility. But by the early 1400s, Mainz was home to more merchants and guild-members than patricians, and conflict between the groups was again frequent. In 1411, an uprising of merchants protesting special tax and customs privileges reserved to the nobility occurred. The protesting rioters set the homes of several patricians on fire. Afraid for their lives, one hundred and seventeen patricians fled Mainz amid the turmoil, including the family of the young Gutenberg. The family soon returned to Mainz, but the city only grew more troubled. Periodically fleeing Mainz was a recurring theme in the life of Gutenberg and many other Mainz residents.

The extent of instability within the city was so disruptive that it contributed to shortages of basic goods. In 1413, food became scarce throughout Mainz. As the city’s people starved, mass hunger riots broke out, resulting in much violence and property destruction. The riots prompted the Gutenberg family, and many others, to flee Mainz once again.

Gutenberg returned to Mainz, always drawn back to his hometown despite its problems. As he entered adulthood, Gutenberg found himself not quite fitting into either warring faction within the city. Many people hated him for his patrician status, which Gutenberg inherited through his father. Still, the city did not grant him the special legal privileges reserved to most patricians because his mother was a commoner by birth. Understanding his precarious position and attempting to safeguard his economic future, Gutenberg took up the metalworking trade.

By 1428, the city of Mainz teetered on the verge of bankruptcy, and the power-dispute between the patricians and guild-members entered a new phase in which the guilds seized power. As the city reeled from internal violence, tribal prejudices, and a crashing economy, many people understandably fled Mainz. Gutenberg was probably one of them, and in any case, he was living in Strasbourg by 1434.

In Strasbourg, Gutenberg transcended his era’s tribalism and strategically befriended both patricians and guildsmen, although he did not join the metalworking guild. Leveraging his connections with local officials, Gutenberg successfully pressured a visiting official from Mainz to pay him a debt that the city of Mainz owed to his family and likely used the capital to bolster his metalworking business. There is also evidence that Gutenberg briefly dabbled in the region’s prominent wine trade. It was while he lived in Strasbourg that Gutenberg probably developed the metal movable-type printing press.

It must be noted that the Chinese invented woodblock printing many centuries earlier. An inventor in Hangzhou, our twelfth Center of Progress, even devised movable-type, as early as the 11th century AD. However, several factors prevented movable print from seeing the level of widespread adoption in China that the technology achieved in Europe. Those factors ranged from the cultural importance that many Chinese placed on handwritten calligraphy to the sheer number of characters in the Chinese writing system. There are thousands of different Chinese characters. Contrastingly, German uses a limited alphabet of 26 letters, making printing the language more practical.

In 1448, Gutenberg went home to Mainz. As Alexander Hammond wrote in his profile of Gutenberg, “With the help of a loan from his brother-in-law, Arnold Gelthus, he was able to build an operating printing press in 1450.” Initially, Gutenberg marketed his innovation as a way to allow monks to reproduce religious texts at a much faster rate. He maintained two presses: one for the bible and one for commercial texts. By 1455, he printed the first 180 copies of “The Gutenberg Bible.” The printing press proved an initial success, allowing Gutenberg to take on apprentices and locally disseminate printmaking knowledge. Unfortunately, a lawsuit by an investor left him near bankruptcy.

The city of Mainz continued to deteriorate in a downward spiral, as a period of economic decline culminated in war between two rival archbishops. The Mainz Diocesan Feud, also known as the Baden-Palatine War, took place in 1461–1462. The combatants fought over the throne of the Electorate of Mainz. Following a close election to become the new Archbishop of Mainz, both Diether of Isenburg (the victor by a small margin) and Adolph of Nassau declared themselves the rightful archbishop. With the help of their respective political allies, Diether and Adolph went to war. Diether had made enemies of both the pope and the Holy Roman Emperor Frederick III, and the latter two thus backed Adolph’s claim. Many people in the city of Mainz, including the city council, continued to support Diether, who refused to vacate the city or his archbishop’s throne.

Adolph and his troops sacked the city, and eventually, Adolph prevailed in seizing control. In 1465, Archbishop Adolph recognized Gutenberg’s contributions to human progress by granting him a court position and a large annual stipend, allowing Gutenberg to live the rest of his days in relative peace and comfort in Mainz, where he is buried.

If you could visit Mainz during the city’s sacking, you would have borne witness to a scene of terrifying violence and destruction. You also would have seen an exodus of the city’s people fleeing. Some of those people carried with them knowledge that would change history.

Almost all of the Centers of Progress featured to date have contributed to progress during ages of relative peace and prosperity, but in Mainz, that was not the case. Instead, the city’s instability became a catalyst for change. The city’s economic and political turmoil drove many craftsmen into exile from the city, including Gutenberg’s printing apprentices, thus spreading the knowledge of the art of printing throughout the European continent with incredible speed.

According to some estimates, by the 1470s, a mere decade later, every major European city had printing companies, and by the 1500s, around four million books had been printed and sold. The ability to reproduce the written word so quickly brought the spread of new ideas. Ranging from the Protestant Reformation to the later Enlightenment and the rise of new forms of government, several massive societal transformations came about largely because of the possibilities presented by the printed word.


“Every time the cost of media declines rapidly, you enable more people to speak out, and you have a greater diversity of voices,” according to the American historian Bill Kovarik, explaining that this impacts the distribution of power in society and sparks social change. Today, the digital revolution has further lowered the cost of disseminating ideas and knowledge, continuing the revolution in communications that began with Gutenberg’s Mainz printing shop.


Plagued by violence and economic problems, Mainz during the 15th century was an unlikely site of progress. But the invention that spread with incredible speed thanks to the diaspora of printmakers fleeing the city was pivotal to the future of human progress. The printing press ultimately helped erode the power of the guilds and the nobility, the very same warring factions that caused so much turmoil in Mainz. By democratizing the spread of information, the printing press enabled the proliferation of everything from scientific and medical texts to philosophical and political treatises. For those reasons, Mainz, the city responsible for Europe’s rapid adoption of the printing press, is our fifteenth Center of Progress.

Blog Post | Environment & Pollution

Climate Litigation Can’t Fix the Past, but It Can Hinder the Future

Dealing with climate change requires technological innovation and economic growth, not legal warfare between nations.

Summary: The International Court of Justice has suggested nations could be held liable for historic greenhouse gas emissions, opening the door to lawsuits over centuries of industrial activity. Yet this approach risks punishing the very innovations that lifted billions out of poverty and advanced human health and flourishing. Lasting progress on climate challenges will come not from courtroom battles, but from technological solutions and continued economic development.


The International Court of Justice’s advisory opinion purporting to establish legal grounds that would allow nations to sue one another over climate damages represents judicial overreach that ignores economic history and threatens global development. While the opinion was undeniably legally adventurous, the framework it envisages would be practically unworkable as well as economically destructive.

The ICJ’s ruling suggests countries can be held liable for historical emissions of planet-warming gases. That creates an accounting nightmare that no legal system can resolve. How does one calculate damages from coal burned in Manchester in 1825 versus emissions from a Beijing power plant in 2025? How does one stack up the harm caused by a warming world against the benefits of industrialization?

Britain began large-scale coal combustion during the Industrial Revolution, when atmospheric CO2 concentrations were 280 parts per million and climate science did not exist. Holding Britain liable for actions taken without knowledge of consequences violates basic principles of jurisprudence. The same applies to the United States, whose early industrialization occurred during an era when maximizing economic output was considered unambiguously beneficial to human welfare.

Critics of historical emissions ignore what those emissions purchased. British coal combustion powered textile mills that clothed much of the world, steam engines that revolutionized transportation, and factories that mass-produced goods previously available only to elites. American industrialization followed, creating assembly lines, electrical grids, and chemical processes that form the backbone of modern civilization.

These developments were not zero-sum exercises in resource extraction. They created knowledge, infrastructure, and institutions that benefited everyone. The steam engine led to internal combustion engines, which enabled mechanized agriculture that now feeds 8 billion people. Coal-powered steel production made possible skyscrapers, bridges, and the infrastructure that supports modern cities, where most humans now live longer, healthier lives than their ancestors.

The data on human welfare improvements since industrialization began are explicit. Global life expectancy increased from approximately 29 years in 1800 to 73 years today. Infant mortality rates fell from over 40 percent to under 3 percent. Extreme poverty, defined as living on less than $2.15 per day in purchasing power parity terms, declined from over 80 percent of the global population in 1800 to under 10 percent today.

Nutrition improved dramatically. Caloric availability per person has increased by roughly 40 percent since 1960 alone, while food prices relative to wages fell consistently. Height, a reliable indicator of childhood nutrition, increased significantly across all regions. Educational attainment expanded from literacy rates below 10 percent globally in 1800 to over 85 percent today.

These improvements correlate directly with energy consumption and industrial development. Countries that industrialized earliest experienced these welfare gains first, then transmitted the knowledge and technology globally. The antibiotics developed in American and European laboratories now save lives worldwide. The agricultural techniques pioneered in industrialized nations now feed populations that would otherwise face starvation.

The International Court of Justice’s liability framework threatens to undermine the very mechanisms that created these welfare improvements. Innovation requires investment, which requires confidence in property rights and legal stability. If successful economic development subjects countries to retroactive liability, the incentive structure tilts away from growth and toward stagnation.

Consider current developing nations. Under this legal framework, should India or Nigeria limit their industrial development to avoid future liability? Should they forgo the coal and natural gas that powered Western development? That creates a perverse situation where the legal system penalizes the exact processes that lifted billions from poverty.

The framework also ignores technological solutions. The same innovative capacity that created the Industrial Revolution is now producing renewable energy technologies, carbon capture systems, and efficiency improvements that address climate concerns without sacrificing development. Market incentives and technological progress offer more promise than legal blame assignment.

Which emissions count as legally actionable? All anthropogenic CO2 remains in the atmosphere for centuries, making every emission since 1750 potentially relevant. Should liability begin with James Watt’s steam engine improvements in 1769? With the first coal-fired power plant? With Henry Ford’s assembly line? The temporal boundaries are arbitrary and politically motivated rather than scientifically determined.

Similarly, which countries qualify as defendants? The largest current emitters include China and India, whose recent emissions dwarf historical American and British totals. China alone now produces more CO2 annually than the United States and Europe combined. Any coherent liability framework must address current emissions, not just historical ones.

And where would the money go? This aspect of the case was brought up by Vanuatu. If the island nation receives compensation from the UK and the US, should it not be obliged to pay the British and the Americans for a plethora of life-enhancing Western discoveries, including electricity, vaccines, the telephone, radio, aviation, internet, refrigeration, and navigation systems?

Climate adaptation and mitigation require technological innovation and economic growth, not legal warfare between nations. The countries that industrialized first possess the technological capacity and institutional knowledge to develop solutions to today’s problems. Channeling resources toward litigation rather than innovation represents a misallocation that benefits lawyers while harming global welfare.

The ICJ opinion reflects wishful thinking rather than practical policy. Legal frameworks cannot repeal economic reality or reverse the historical processes that created modern prosperity. Instead of seeking retroactive justice for emissions that enabled human flourishing, policymakers should focus on technologies and institutions that sustain development while addressing environmental concerns. The alternative is a world where legal systems punish success and innovation while offering nothing constructive in return.

The original version of this article was published in National Review on 8/12/2025.

Bloomberg | Communications

Audible to Start Generating AI Voice Replicas of Select Narrators

“Amazon.com Inc.’s Audible will begin inviting a select group of US-based audiobook narrators to train artificial intelligence on their voices, the clones of which can then be used to make audiobook recordings. The effort, which kicks off this week, is designed to add more audiobooks to the service, quickly and cheaply — and to welcome traditional narrators into the evolving world of audiobook automation which, to date, many have regarded warily.”

From Bloomberg.

Blog Post | Women's Empowerment

The Glory Days of Women’s Culture in China

The decline of Chinese women’s literary culture reminds us that progress is not irreversible.

Summary: Under Xi Jinping’s leadership, women’s rights and freedom of expression in China have faced severe repression, with censorship stifling discourse on gender and punishing outspoken female writers. Periods of greater political liberty saw flourishing women’s literature that challenged traditional roles and highlighted women’s ambition. Despite the current crackdown, the resilience of female writers persists through underground literary communities.


For women’s rights activists in China, the 2020s seem to be the worst time ever. Under Xi’s presidency, censorship of public opinions has peaked, including that of writings about gender equality. Journalist Huang Xueqin, who published investigations on #MeToo cases, for example, was incarcerated for “subversion.”

Literature also has suffered a bigger setback.  Since the Chinese Communist Party (CCP) outlawed any negative commentary on its legitimacy, writers have had to sacrifice their artistry for safety. Those who hold on to their commitment to the arts are banished from the publication world. Yan Geling, one of the most famous Chinese female writers of the 21st century, was banned from all press for critiquing Xi’s treatment of women.

However, the environment for female writers in China has not always been oppressive. Rather, the extent of women’s cultural contributions has always been negatively correlated with the governmental control of individual liberty.

The first surge of women’s writing in modern China was during the 1920–30s, when the nation was under the governance of the Nationalist Party of China (NPC). Despite the wartime turmoil and the infamously corrupt NPC government, society at the time was highly liberal. At the turn of the century, the traditional academic community was replaced by a new generation of intellectuals, most of whom had received Western education. In 1915, these young scholars started the New Cultural Movement. The movement fought against feudalism and advocated for democracy, liberalism, individual freedom, and equality for women. By the 1920s, Chinese society had incubated a myriad of liberal writers, artists, and academics, including some of the most important female literati in modern China, such as Zhang Eileen, Ding Ling, and Xiao Hong. Be it Zhang’s Love in a Fallen City, Ding’s Diary of Miss Sophie, or Xiao’s The Field of Life and Death, their works thematized the experiences of “new women.” Though clenched between the lingering feudalist customs and the transitioning new era, they continued to pursue independence and freedom.

The liberal environment did not survive, as what followed was the establishment of Communist China and, subsequently, the 10-year Cultural Revolution—a time when the government, rather than the people, defined how an individual should think and feel.

Donned the “Stinky Ninth Class,” the literati were considered “spiritually unclean.” During the Yan’an Conference on Literature and Art, Mao Zedong announced that all works of art and literature must extol the Communist regime and serve only the interests of the workers, peasants, and soldiers. Literature, once the epitome of free speech, became a vessel for CCP propaganda.

The female writers, who had thrived in early 20th-century China, were deprived of their voices. Many were tortured to death by the Red Guards; those who survived had to relocate abroad. Ding, for example, was banished to the northern deserts, and Zhang immigrated to the United States. Slogans popularized by the government such as “whatever men can do, women can do too” ostensibly supported gender equality but, in truth, constituted an attempt to masculinize women. This propaganda masked the government’s rejection of women as an independent gender that had its unique history and needs.

The turning point occurred when Deng Xiaoping took over the presidency and introduced the “Reform and Opening Up” policies in the 1980s. He reinstated a significant degree of economic and political liberty by allowing foreign investment. Meanwhile, he ended Mao’s state surveillance and class struggle propaganda and, until the Tiananmen Massacre in 1989, supported free speech.

The transformed political environment revived literature. The public’s suppressed yearning to express themselves in the previous 10 years burst forth in the form of a literary mania. Writers and poets, who used to be despised by all, were idolized. Thousands of people swarmed into auditoriums to attend poetry readings, and when they ended, rushed to the stage in tears and hugged the poets; some even kneeled and kissed the poets’ shoes. As a result, the female writers were able to rebuild their community and eventually channeled the “Golden Age” of women’s writing. Poets such as Shu Ting and Zhai Yongming and writers like Wang Anyi and Zong Pu, through avant-garde writing styles, told stories of modern women’s tenacity amid the political turmoil and the trials they underwent trying to obtain equality in a new time. They presented to society an image of women being strong-willed and ambitious, overturning the traditional perception of them as weak and dependent.

Though the current illiberalism in China is restricting women’s freedom to express themselves, the resilience that persisted through a history of constant changes and frequent catastrophes has grown stronger. An “underground” literary community came into being. Women organized off-the-books writing groups, book clubs, and literature societies, where they admired women’s writings over the past century. Women’s literary culture might be declining in China, a good reminder that progress is not irreversible, but as long as the predecessor’ legacy is still cherished, it will persevere.

Our World in Data | Literacy

Two Centuries Ago, Only 1 in 10 Adults Could Read. Today, It’s Almost 9 in 10

“In 1820, only 1 in 10 people over the age of 15 could read. Today, the corresponding global literacy rate — the share of adults aged 15 and older who can read and write — is 87%. That means more than 5 billion people can read and write today, compared to fewer than 100 million two centuries ago.”

From Our World in Data.