Undoubtedly, Darwin's theory of organic evolution would be voted as the most significant theory of the 19th century. Both dominate, despite their growing scientific problems, because schools and the media ignore competing explanations. Chamberlin warned about the comfort of conformity. The two competing explanations can be explained simply, as was done in Figures 82 and 84 . More information can be added as student curiosity, time, and ability permit.
Students can examine and compare the evidence and tentatively decide.
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