Social Darwinism believed that individuals were subject to natural selection and survival of the fittest, so the rich were considered fit and the poor unfit. It justified racism, eugenics, and imperialism. The Gospel of Wealth argued the wealthy should use philanthropy to help the poor through libraries and donations rather than just leaving money to heirs. Both viewed the rich as superior but the Gospel of Wealth aimed to improve the poor's condition while Social Darwinism saw the poor as inferior and deserving to die off.