Actually, humans are very much genetically predisposed towards love. Unlike Chimpanzees, we do not have fangs to use as weapons on each other. War has evolved only since ancient times - 6,000 years or so - as a way of surviving in large numbers (civilization) when humans over-run the available resources. Otherwise, in small groups, humans are genetically adapted to be cooperative. In most tribal societies, nobody eats until everyone eats. Women nurse each others babies, and collecting food is a cooperative behavior. War is an artifact of basically a few megalomaniacs who want to build empires and who use others blood to get it. Most people would rather help each other, due to our mirror neurons. Its the 5% of psychopaths that we need to watch. Who do you want to murder today?