The Historical Thesaurus of the Oxford English Dictionary defines progress as “advancement to a further or higher stage, or to further or higher stages successively; growth; development, usually to a better state or condition; improvement . . . applied especially to manifestations of social and economic change or reform.” But, what do “higher stage” and “better state” mean? Are those terms purely subjective or can a near-universal understanding of human progress be arrived at? Steven Pinker from Harvard University provides an answer that the creators of this website also subscribe to:

“What is progress? You might think that the question is so subjective and culturally relative as to be forever unanswerable. In fact it’s one of the easier questions to answer.
Most people agree that life is better than death. Health is better than sickness. Sustenance is better than hunger. Wealth is better than poverty. Peace is better than war. Safety is better than danger. Freedom is better than tyranny. Equal rights are better than bigotry and discrimination. Literacy is better than illiteracy. Knowledge is better than ignorance. Intelligence is better than dull-wittedness. Happiness is better than misery. Opportunities to enjoy family, friends, culture, and nature are better than drudgery and monotony.
All these things can be measured. If they have increased over time, that is progress.
Granted, not everyone would agree on the exact list. The values are avowedly humanistic, and leave out religious, romantic, and aristocratic virtues like salvation, grace, sacredness, heroism, honor, glory, and authenticity.
But most would agree that it’s a necessary start. It’s easy to extoll transcendent values in the abstract, but most people prioritize life, health, safety, literacy, sustenance, and stimulation for the obvious reason that these goods are a prerequisite to everything else. If you’re reading this, you are not dead, starving, destitute, moribund, terrified, enslaved, or illiterate, which means that you’re in no position to turn your nose up at these values – nor to deny that other people should share your good fortune.”

Steven Pinker, Enlightenment Now: The Case for Reason, Science, Humanism, and Progress (New York: Viking Press, 2018)