The field of Evolutionary Psychology starts with the basic idea that we are born with a brain that has information in it that has helped previous generations to survive and provides motivation for many of our acts.  It includes a strong attachment to others in OUR TRIBE and provides a basis for our: love, need for justice, compassion, and competiveness.  It also helps explain other tendencies like: our need to enhance our image, a tendency to lie when it benefits us, and racial bias.  On occasion, we are willing to take a small risk for a large reward even if the risk involves an un-ethical act.   Understanding this hidden part of ourselves will allow us to more clearly choose how we act or choose to not act.  It also assists us in understanding the acts of other people. 

Don Emon