On this Darwin Day, or indeed on any other day, read Darwin's Pious Idea, by Conor Cunningham. Take a look here. Look up Professor Simon Conway-Morris. Weep for the atheist philosophers who every year have to try and deprogram another batch of freshers who have read the bane, and effectively the denier, of their existence, Richard Dawkins.
And remember that "the survival of the fittest" is not a scientific proposition, but a philosophical one, which entirely fails in those terms, since it is tautologous, the only way to spot the fittest being the fact that they survive. Any atheist philosopher could tell you that. An atheist philosopher did tell me that. He was right.