[Old Professer]

Darwin's vanity led him to trump Wallace and his credentials allowed it.

[CarolinaGuitarman]

"Darwin's vanity led him to trump Wallace and his credentials allowed it."

It wasn't his vanity, it was the fact that he had formulated natural selection a few decades before Wallace, and the fact that his version was better than Wallace's. Wallace didn't consider competition among the individuals of a species; Darwin did.