The 1931 Histomap: The entire history of the world distilled into a single map/chart.
Jared Sperli stashed this in fun
Why don't I ever get a prize like that? I really love that graphic--do you think I can just say "Here." on Day One, go for coffee and give a test in June? It pretty much says it all...
Rebecca Onion explains the Histomap:
The 5-foot-long Histomap was sold for $1 and folded into a green cover, which featured endorsements from historians and reviewers.
The chart emphasizes domination, using color to show how the power of various “peoples” (a quasi-racial understanding of the nature of human groups, quite popular at the time) evolved throughout history.
It’s unclear what the width of the colored streams is meant to indicate. In other words, if the Y axis of the chart clearly represents time, what does the X axis represent? Did Sparks see history as a zero-sum game, in which peoples and nations would vie for shares of finite resources? Given the timing of his enterprise—he made this chart between two world wars and at the beginning of a major depression—this might well have been his thinking.
Perhaps the X axis represents percentage of worldwide population?
China is way to small then (compared to USA) so I doubt it. I imagine the X axis represents world sway/power/influence in his mind.