Hans Rosling: 200 Countries, 200 Years, 4 Minutes

HN commenters send it as a short antidote to cynicism, showing long-term global progress and the shrinking gap between rich and poor countries.

Hans Rosling uses augmented-reality animation to show 200 countries over 200 years in four minutes, built from 120,000 data points. It tracks life expectancy and income to show the world's development.