In 1859 Charles Darwin published On the Origin of Species, one of the most important books in the history of science. First, briefly explain Darwin's theory including the influence of Robert Malthus and how it differed from the evolutionary theory of Jean-Baptiste Lamarck. Next, explain the influence of Darwinism as Social Darwinism, i.e., the application of Darwin's theory to human societies-in terms of Imperialism and Eugenics.