Well, maybe someone else might have done what Einstein did, but while the mathematical developments of the 19th Century, and the Michelson-Morly Experiment might have been necessary for his theory, they were not sufficient. I think that there needs to someone who can make that leap. Why Darwin and not Wallace? Because Wallace was a social nobody and Darwin was a “somebody.” My brother-in-law devised a star map for the astronauts, and Buzz Aldin, who gave some input, took the credit. A man must have the chance, must be in a position to act greatly before he can become great. Anatole France had a short story of what life would have been like in France if the Revolution had been avoided. Old Captain Bonaparte would shared his stories with the village children of life in a French Army where command was limited to the high nobility.