Question: According to the reading by Singer, it is mainly biologists who have argued in favor of Egoism. What is the main argument used by biologists to argue in favor of Egoism? Need Assignment Help? Question options: Because we stand upright on two legs, we can see danger coming, so we are simply better at protecting ourselves than most other species. Because of our bigger brains, we can understand the complex idea that looking out for ourselves is actually better for society as a whole. Evolution has favored those who take care of themselves, so it has programmed self-interest into humans as a natural sense.