History Memes

Mendel's work played almost no role in the acceptance of the theory of natural selection. While the work was contemporaneous, Mendel did not publish widely and the work was not well known. Darwin's work was defended and beaten into scientific orthodoxy by Thomas Henry Huxley who was known as "Darwin's Bulldog". He would appear at the Royal Society and take on all comers while Darwin mooned around in Kent. Mendel's work was never cited in Darwin's work, and Huxley was also unaware of it. As a matter of fact almost no one knew about it.

Mendel's work was independently discovered at the turn of the 20th century, and Mendel was given scientific priority retrospectively. In science we describe that kind of thing as a "premature discovery". Because something was found, and was true, but had little impact at the time.