> All our moral codes and social norms we live by are purely human invention I'd say much of it is selected for by evolution. e.g. Most animals don't fight or

> All our moral codes and social norms we live by are purely human invention I'd say much of it is selected for by evolution. e.g. Most animals don't fight or kill more than they need to since this is not optimal - risk of personal injury and depleting a food resource (there are exceptions of course such as the fox in the henhouse), and this is so universal it seems it has to have a genetic basis.