The Entire History of the World—Really, All of It—Distilled Into a Single Chart
This “Histomap,” created by John B. Sparks, was first printed by Rand McNally in 1931. (The David Rumsey Map Collection hosts a fully zoomable version here.) (Update: Click on the image below to arrive at a bigger version.)
This giant, ambitious chart fit neatly with a trend in nonfiction book publishing of the 1920s and 1930s: the “outline,” in which large subjects (the history of the world! every school of philosophy! all of modern physics!) were distilled into a form comprehensible to the most uneducated layman.