Theory posits that hunter gatherer groups with morality out survived those that didn"t. Evolution isn"t always self interest, it is about reproduction. Even if it isn"t beneficial to you specifically. Self interest gets extended to all family members. Could include social groups, ethnic groups, religious groups etc Ethnocentrism: caring more about your own group than others. People who are left on the political spectrum tend to be less ethnocentric. Some people believe we learn morality from our culture. Evolutionary theory says these morals are already ingrained in use. This can be tested by forcing someone to make quick decision. Person will likely rely on their evolutionary morals. Cognitive load: having someone perform two tasks at once that use frontal lobe. This forces them to make moral decisions using other areas of the brain. People still perform well in the morality part which suggest that morality may partially come from evolution. Front of their brain says you must kill child.