This is a jarring thought:
A paper by Diego Comin, Erick Gong, and myself was just published in the American Economic Journal: Macroeconomics. We collected crude but informative data on the state of technology in various parts of the world in 1000 BC, 0 AD, and 1500 AD.
1500 AD technology is a particularly powerful predictor of per capita income today. 78 percent of the difference in income today between sub-Saharan Africa and Western Europe is explained by technology differences that already existed in 1500 AD even BEFORE the slave trade and colonialism.
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2006-2011 archives for The Daily Dish, featuring Andrew Sullivan