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01 / 05
Halloween: More Walking Dead, Fewer Dead Walkers

Blog Post | Health & Medical Care

Halloween: More Walking Dead, Fewer Dead Walkers

Today’s trick-or-treaters have far less to fear than past generations.

Summary: Halloween is a celebration of death and fear, but it also reveals how much safer and healthier life has become. This article shows how child mortality, especially from pedestrian accidents, has declined dramatically in recent decades. It also explores how other causes of death, such as disease and violence, have become less common thanks to human progress.


This Halloween, you might see your neighbors’ front yards decorated with faux tombstones and witness several children dressed as ghosts, skeletons, zombies, or other symbols of death. Thankfully, today’s trick-or-treaters can almost all expect to remain among the living until old age. But back when the holiday tradition of children going door-to-door in spooky costumes originated, death was often close at hand, and the young were particularly at risk.

Halloween’s origins are closely linked to concerns about death. The holiday arose out of All Souls’ Day, a Christian commemoration for the deceased falling on November 2 that is also simply called the Day of the Dead. In the Middle Ages, this observance was often fused with another church feast called All Saints’ Day or All Hallows’ Day on November 1. The night before, called All Hallows’ Eve—now shortened to Halloween—in parts of medieval Britain, children and people who were poor would visit their wealthier neighbors and receive “soul cakes,” round pastries with a cross shape on them. In exchange, they promised to pray for the cake-givers’ dead relatives. This was called “souling.”

In Ireland and Scotland, Halloween also incorporated some aspects of an old Celtic pagan tradition called Samhain, including bonfires and masquerades. Samhain was also associated with death and sometimes called the feast of the dead. Eventually the traditions of wearing masks and of going door-to-door for treats combined, and young people in Ireland and Scotland took part in a practice called “guising” that we now call trick-or-treating. Dressing as ghouls and other folkloric incarnations of death became popular.

In the 1800s, an influx of Irish immigrants is thought to have popularized this Halloween tradition in the United States. The phrase “trick-or-treating” dates to at least the 1920s, when Halloween pranks or tricks also became a popular pastime. But according to National Geographic, “Trick-or-treating became widespread in the U.S. after World War II, driven by the country’s suburbanization that allowed kids to safely travel door to door seeking candy from their neighbors.”

And just how safe today’s trick-or-treaters are, especially compared to the trick-or-treaters of years past, is underappreciated. Despite the occasional public panic about razor blades in candy, malicious tampering with Halloween treats is remarkably rare, especially given that upward of 70 percent of U.S. households hand out candy on Halloween each year.

The biggest danger to today’s trick-or-treaters is simply crossing streets. But while Halloween is the deadliest night of the year for children being struck by cars, there is heartening news: annual child pedestrian deaths have declined dramatically. The number of pedestrian deaths among children aged 13 or younger fell from 1,632 in 1975 to 144 in 2020. The steep decline is even more impressive when one considers that it occurred as the total number of people and cars in the country has increased substantially.

Today’s children are thus safer as they venture out on Halloween than the last few generations of trick-or-treaters were. And, of course, when compared to the world of the very first children to celebrate Halloween, the modern age is by many measures less dangerous, especially for the young. In medieval England, when “souling” began, the typical life expectancy for ducal families was merely 24 years for men and 33 for women. While data from the era is sparse, among non-noble families in Ireland and Scotland, where “guising” began, living conditions and mortality rates may have been far worse.

It is estimated that between 30 and 50 percent of medieval children did not survive infancy, let alone childhood, with many dying from diseases that are easily preventable or treatable today. Given that context, the medieval preoccupation with death that helped give rise to traditions like Halloween is quite understandable. Life expectancy was lower for everyone, even adult royalty: the mean life expectancy of the kings of Scotland and England who reigned between the years 1000 and 1600 was 51 and 48 years, respectively. Before the discovery of the germ theory of disease, the wealthy, along with “physicians and their kids lived the same amount of time as everybody else,” according to Nobel laureate Angus Deaton.

In 1850, during the wave of Irish immigration to the United States that popularized Halloween, little progress had been made for the masses: white Americans could expect to live only 25.5 years—similar to what a medieval ducal family could expect. (And for African Americans, life expectancy was just 21.4 years.)

But the wealth explosion after the Industrial Revolution soon funded widespread progress in sanitation. That reduced the spread of diarrheal diseases, a major killer of infants—and one of the top causes of death in 1850—improving children’s survival odds and lengthening lifespans. By 1927, the year when the term “trick-or-treating” first appeared in print, there had been clear progress: U.S. life expectancy was 59 years for men and 62 years for women. The public was soon treated to some innovative new medical tricks: the following year, antibiotics were discovered, and the ensuing decades saw the introduction of several new vaccines.

In 2021, U.S. life expectancy was 79.1 years for women and 73 years for men. That’s slightly down from recent years but still decades longer than life expectancy for the aforementioned medieval kings who ruled during Halloween’s origins. Life expectancy has risen for all age groups, but especially for children, thanks to incremental progress in everything from infant care to better car-seat design.

So as you enjoy the spooky festivities this Halloween, take a moment to appreciate that today’s trick-or-treaters inhabit a world that is in many ways less frightening than when Halloween originated.

Morocco World News | Population Demographics

Morocco’s Remarkable Progress in Reducing Child Mortality

“According to the report, the under-five mortality rate in Morocco has declined by an impressive 4.8 percent, dropping from 81 deaths per 1,000 live births in 1990 to 52 in 2000, and further to 17 in 2022.

The report also reveals that the infant mortality rate in Morocco has decreased from 64 deaths per 1,000 infants in 1990 to 15 deaths in 2022. Additionally, the neonatal mortality rate has declined by 3.9 percent, falling from 37 deaths per 1,000 live births in 1990 to 29 deaths in 2000, and reaching 11 in 2022.”

From Morocco World News.

Blog Post | Urbanization

Lessons From Adam Smith’s Edinburgh and Paris

Examining the places where major advances happened is one way to learn about the conditions that foster societal flourishing, human achievement, and prosperity.

Summary: Amidst the turmoil of modern times, evidence reveals significant progress across various metrics, from rising life expectancy to declining global poverty. Cities have emerged as epicenters of innovation and progress throughout history, fostering collaboration, competition, and freedom of thought. By exploring the unique environments of cities like Edinburgh and Paris, where intellectual liberty thrived, Chelsea Follett uncovers the vital role of peace, freedom, and population density in driving human achievement and societal advancement.


This article appeared in Adam Smith Works on 2/8/2024.

Has humanity made progress? With so many serious problems, it is easy to get the impression that our species is hopeless. Many people view history as one long tale of decay and degeneration since some lost, idealized golden age.

But there has been much remarkable, measurable improvement—from rising life expectancy and literacy rates to declining global poverty. (Explore the evidence for yourself). Today, material abundance is more widespread than our ancestors could have dreamed. And there has been moral progress too. Slavery and torture, once widely accepted, are today almost universally reviled.

Where did all this progress come from? Certain places, at certain times in history, have contributed disproportionately to progress and innovation. Change is a constant, but progress is not. Studying the past may hold the secret to fostering innovation in the present. To that end, I wrote a book titled Centers of Progress: 40 Cities that Changed the World, exploring the places that shaped modern life.

The origin points of the ideas, discoveries, and inventions that built the modern world were far from evenly or randomly dispersed throughout the globe. Instead, they tended to emerge from cities, even in time periods when most of the human population lived in rural areas. In fact, even before anything that could be called a city by modern standards existed, progress originated from the closest equivalents that did exist at the time. Why is that?

“Cities, the dense agglomerations that dot the globe, have been engines of innovation since Plato and Socrates bickered in an Athenian marketplace,” urban economist Edward Glaeser opined in his book The Triumph of the City. Of course, he was hardly the first to observe that positive change often emanates from cities. As Adam Smith noted in 1776, “the commerce and manufactures of cities, instead of being the effect, have been the cause and occasion of the improvement and cultivation of the country.”

One of the reasons that progress tends to emerge from cities is, simply, people. Wherever more people gather together to “truck, barter, and exchange,” in Smith’s words, that increases their potential to engage in productive exchange, discussion, debate, collaboration, and competition with each other. Cities’ higher populations allow for a finer division of labor, more specialization, and greater efficiencies in production. Not to mention, more minds working together to solve problems. As the writer Matt Ridley notes in the foreword he kindly wrote for Centers of Progress, “Progress is a team sport, not an individual pursuit. It is a collaborative, collective thing, done between brains more than inside them.”

A higher population is sufficient to explain why progress often emerges from cities, but, of course, not all cities become major innovation centers. Progress may be a team sport, but why do certain cities seem to provide ideal playing conditions, and not others?

That brings us to the next thing that most centers of progress share, besides being relatively populous: peace. That makes sense, because if a place is plagued by violence and discord then it is hard for the people there to focus on anything other than survival, and there is little incentive to be productive since any wealth is likely to be looted or destroyed. Smith recognized this truth, and noted that cities, historically, sometimes offered more security from violence than the countryside:

Order and good government, and along with them the liberty and security of individuals, were in this manner established in cities, at a time when the occupiers of land in the country, were exposed to every sort of violence. But men in this defenceless state naturally content themselves with their necessary subsistence; because, to acquire more, might only tempt the injustice of their oppressors. On the contrary, when they are secure of enjoying the fruits of their industry, they naturally exert it to better their condition, and to acquire not only the necessaries, but the conveniencies and elegancies of life. That industry, therefore, which aims at something more than necessary subsistence, was established in cities long before it was commonly practised by the occupiers of land in the country. […] Whatever stock, therefore, accumulated in the hands of the industrious part of the inhabitants of the country, naturally took refuge in cities, as the only sanctuaries in which it could be secure to the person that acquired it.

Of course, not all cities were or are peaceful. Consider Smith’s own city: Edinburgh. At times, the city was far from stable. But the relatively unkempt and inhospitable locale emerged from a century of instability to take the world by storm. Scotland in the 18th century had just undergone decades of political and economic turmoil. Disruption was caused by the House of Orange’s ousting of the House of Stuart, the Jacobite Rebellions, the failed and costly colonial Darien Scheme, famine, and the 1707 Union of Scotland and England. It was only after things settled down and the city came to enjoy a period of relative peace and stability that Edinburgh rose to reach its potential. Edinburgh was an improbable center of progress. But Edinburgh proves what people can accomplish, given the right conditions.

During the Scottish Enlightenment centered in Edinburgh, Adam Smith was far from the only innovative thinker in the city. Edinburgh’s ability to cultivate innovators in every arena of human achievement, from the arts to the sciences, seemed almost magical.

Edinburgh gave the world so many groundbreaking artists that the French writer Voltaire opined in 1762 that “today it is from Scotland that we get rules of taste in all the arts, from epic poetry to gardening.” Edinburgh gave humanity artistic pioneers from the novelist Sir Walter Scott, often called the father of the historical novel, to the architect Robert Adam who, together with his brother James, developed the “Adam style,” which evolved into the so‐​called “Federal style” in the United States after Independence.

And then there were the scientists. Thomas Jefferson, in 1789, wrote, “So far as science is concerned, no place in the world can pretend to competition with Edinburgh.” The Edinburger geologist James Hutton developed many of the fundamental principles of his discipline. The chemist and physicist Joseph Black, who studied at the University of Edinburgh, discovered carbon dioxide, magnesium, and the important thermodynamic concepts of latent heat and specific heat. The anatomist Alexander Monro Secondus became the first person to detail the human lymphatic system. Sir James Young Simpson, admitted to the University of Edinburgh at the young age of fourteen, went on to develop chloroform anesthesia.

Two of the greatest gifts that Edinburgh gave humanity were empiricism and economics. The influential philosopher David Hume was among the early advocates of empiricism and is sometimes called the father of philosophical skepticism. And by creating the field of economics, Smith helped humanity to think about policies that enhance prosperity. Those policies, including free trade and economic freedom that Smith advocated, have since helped to raise living standards to heights that would be unimaginable to Smith and his contemporaries.

That brings us to the last but by no means least secret ingredient of progress. Freedom. Centers of progress during their creative peak tend to be relatively free and open for their era. That makes sense because simply having a large population is not going to lead to progress if that population lacks the freedom to experiment, to debate new propositions, and to work together for their mutual benefit. Perhaps the biggest reason why cities produce so much progress is that city dwellers have often enjoyed more freedom than their rural counterparts. Medieval serfs fleeing feudal lands to gain freedom in cities inspired the German saying “stadtluft macht frei” (city air makes you free).

That adage referred to laws granting serfs liberty after a year and a day of urban residency. But the phrase arguably has a wider application. Cities have often served as havens of freedom for innovators and anyone stifled by the stricter norms and more limited choices common in smaller communities. Edinburgh was notable for its atmosphere of intellectual freedom, allowing thinkers to debate a wide diversity of controversial ideas in its many reading societies and pubs.

Of course, cities are not always free. Authoritarian states sometimes see laxer enforcement of their draconian laws in remote areas, and Smith himself viewed rural life as in some ways less encumbered by constraining rules and regulations than city life. But as philosophy professor Kyle Swan previously noted for Adam Smith Works:

Without denying the charms and attractions Smith highlights in country living, let’s not forget what’s on offer in our cities: a significantly broader range of choices! Diverse restaurants and untold many other services and recreations, groups of people who like the same peculiar things that you like, and those with similar backgrounds and interests and activities to pursue with them — cities are (positive) freedom enhancing.

The same secret ingredients of progress—people, peace, and freedom—that helped Edinburgh to flourish during Smith’s day can be observed again and again throughout history in the places that became key centers of innovation. Consider Paris.

As the capital of France, Paris attracted a large population and became an important economic and cultural hub. But it was an unusual spirit of freedom that allowed the city to make its greatest contributions to human progress. Much like the reading societies and pubs of Smith’s Edinburgh, the salons and coffeehouses of 18th‐​century Paris provided a place for intellectual discourse where the philosophes birthed the so‐​called Age of Enlightenment.

The Enlightenment was a movement that promoted the values of reason, evidence‐​based knowledge, free inquiry, individual liberty, humanism, limited government, and the separation of church and state. In Parisian salons, nobles and other wealthy financiers intermingled with artists, writers, and philosophers seeking financial patronage and opportunities to discuss and disseminate their work. The gatherings gave controversial philosophers, who would have been denied the intellectual freedom to explore their ideas elsewhere, the liberty to develop their thoughts.

Influential Parisian and Paris‐ based thinkers of the period included the Baron de Montesquieu, who advocated the then‐​groundbreaking idea of the separation of government powers and the writer Denis Diderot, the creator of the first general‐​purpose encyclopedia, as well the Genevan expat Jean‐​Jacques Rousseau. While sometimes considered a counter‐​Enlightenment figure because of his skepticism of modern commercial society and romanticized view of primitive existence, Rousseau also helped to spread skepticism toward monarchy and the idea that kings had a “divine right” to rule over others.

The salons were famous for sophisticated conversations and intense debates; however, it was letter‐​writing that gave the philosophes’ ideas a wide reach. A community of intellectuals that spanned much of the Western world—known as the Republic of Letters—increasingly engaged in the exchanges of ideas that began in Parisian salons. Thus, the Enlightenment movement based in Paris helped spur similar radical experiments in thought elsewhere, including the Scottish Enlightenment in Edinburgh. Smith’s many exchanges of ideas with the people of Paris, including during his 1766 visit to the city when he dined with Diderot and other luminaries, proved pivotal to his own intellectual development.

And then there was Voltaire, sometimes called the single most influential figure of the Enlightenment. Although Parisian by birth, Voltaire spent relatively little time in Paris because of frequent exiles occasioned by the ire of French authorities. Voltaire’s time hiding out in London, for example, enabled him to translate the works of the political philosopher and “father of liberalism” John Locke, as well as the English mathematician and physicist Isaac Newton. While Voltaire’s critiques of existing institutions and norms pushed the boundaries of acceptable discourse beyond even what would be tolerated in Paris, his Parisian upbringing and education likely helped to cultivate the devotion to freethinking that would come to define his life.

By allowing for an unusual degree of intellectual liberty and providing a home base for the Enlightenment and the far‐​ranging Republic of Letters, Paris helped spread new ideas that would ultimately give rise to new forms of government—including modern liberal democracy.

Surveying the cities, such as Edinburgh and Paris, that built the modern world reveals that when people live in peace and freedom, their potential to bring about positive change increases. Examining the places where major advances happened is one way to learn about the conditions that foster societal flourishing, human achievement, and prosperity. I hope that you will consider joining me on a journey through the book’s pages to some of history’s greatest centers of progress, and that doing so sparks many intelligent discussions, debates, and inquiries in the Smithian tradition about the causes of progress and wealth.

World Bank | Population Demographics

Historic Milestone as Global Child Deaths Fall Below 5 Million in 2022

“In 2022, the number of children that died before their fifth birthday worldwide dropped to below 5 million for the first time, according to a recent United Nations Inter-agency Group for Child Mortality Estimation report.

Since 2000, the global under-five mortality rate  has declined by more than half, from 76 per 1,000 live births to 37 per 1,000 live births, the estimates show.”

From World Bank.

Times of India | Health & Demographics

Indian State of Maharashtra Sees 11 Percent Drop in Child Mortality

“Child deaths in Maharashtra (in terms of absolute numbers) has seen an 11% decline over the last four years, according to data released by the state public health department on Wednesday…

Deaths among children aged up to five years decreased from 19,185 in 2019-20 to 17,150 in 2022-23. About two-thirds of the deaths continue to be in babies less than a month old, a bracket that’s the most vulnerable to conditions such as sepsis, pneumonia, and low birth weight. The most significant drop, 15%, has been observed in infant (0-1 yr) deaths.”

From Times of India.