They have chosen to follow other evolutionary survival traits such as greed, fear of change even brain washing and call it their religious beliefs. (religion.blogs.cnn.com)
Secondly, I think that for much of human history, caution and group loyalty have been useful survival traits. (newscientist.com)
This lingering survival trait gives us the ability to discern those looking out for our best interest and those looking out for their own. (happyselfpublisher.com)