@ehBeth,
The word "evolve" has different meanings. Let's not confuse them.
When I say, my ideas about love have evolved as I have gotten older. What I am saying is that as I have experienced more, my ideas have become more complex and more sophisticated.
When I say, humans evolved from one-celled organisms, I am talking about a biological process involving genetic mutation during the process of reproduction. In biological evolution there are lots of offspring over many generations each competing for resources.
The evolution of ideas can not be blamed on biological evolution any more than falling in love can be blamed on gravity.