Our life is so short that we can not take inference out of life time observation. When we die, may be we are the most confused ones. We have no idea on "why???" even moments before we die. And eventually we die. Birth and death are two fixed points of our life.
(This is going philosophical... lets see.)
There are always some big questions to ask.
What propagates is the knowledge (and bias) and cultural memories
Brief Note by wired:
Evolution: 24 myths and misconceptions
on New Scientists.