History geeks - hereā€™s a map every (popular) historical event from 2000 B.C. to 1931 - thatā€™s more than 4,000 years of Amorites, Famines, Plagues, Aegeans, Wars, Huns, Discoveries, Romans and religions.
The chart was created by John B. Sparks and printed by Rand McNally in 1931. (Click the map to make it bigger)
Check out Slate for the full story.