But the 20th century suffered "two" ideologies that led to genocides. The other one, Marxism, had no use for race, didn't believe in genes and denied that human nature was a meaningful concept. Clearly, it's not an emphasis on genes or evolution that is dangerous. It's the desire to remake humanity by coercive means (eugenics or social engineering) and the belief that humanity advances through a struggle in which superior groups (race or classes) triumph over inferior ones.
Steven PinkerStatisticians tell us that people underestimate the sheer number of coincidences that are bound to happen in a world governed by chance.
Steven PinkerThe theory that religion is a force for peace, often heard among the religious right and its allies today, does not fit the facts of history.
Steven Pinker