no one is really completely nihilistic

I would agree, there are some you can still communicate with on some levels. Others though are completely dominated by their egos.

theory of evolution? I'm neither particularly anti- nor pro on this

If you believe in creationism, then it is not compatible with evolution and the big bang theory or? You cannot have your cake and eat it so to say. No one has documented a fish giving birth to a monkey yet, but I'm all ears if you see it.