I watched a video yrs ago. Down in the amazon a baby egret was being reckless and getting to far from the nest. It fell in the water and the piranha ate it. The video went on to say how that bird could no go on and pass genes along to a new generation so now the egrets would be more naturally cautious. That is Darwinism. That bird like Tray made a reckless decision and now can't pass on its genes.