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.)
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.
The 5-foot-long Histomap was sold for $1 and folded into a green cover, which featured endorsements from historians and reviewers. The chart was advertised as “clear, vivid, and shorn of elaboration,” while at the same time capable of “holding you enthralled” by presenting...MORE
