Jonathan Haidt, the well-known psychologist from New York University, started as a «typical» liberal intellectual, but came to appreciate the awesome ability of free markets to improve the lives of the poor. Earlier this year, he penned an essay in which he pointed to what he called «the most important graph in the world.» The graph reflected Angus Maddison’s data showing a massive increase in wealth throughout the world over the last two centuries and which is reproduced, courtesy of Human Progress, below.

See complete post by Marian L. Tupy.