Cover Picture
The book's title is a reference to the famous picture March of Progress. This drawing, by Rudolph Zallinger, was published in the Time-Life book Early Man in 1965 and shows a sequence of primates walking from left to right, starting with a non-human ape on the left, progressing through a series of hominids, and finishing with a modern human on the right. A version of the drawing is on the cover of the book, and Wells describes it as the "ultimate icon" of evolution.
Read more about this topic: Icons Of Evolution
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