"I have approximate answers and possible beliefs and different degrees of certainty about different things, but I'm not absolutely sure of anything..." (Richard Feynman)
I think that Steven Pinker's theories are an important part of a keyset to rethink the concepts of "Freedom and Progress". The existence of a "human nature" also justifies something as a concept of "humanity" but thought very severly only in a "non-transcendental"way. But there are global human values - from evolution and civilization.