The term often leads into confusion, however, since international compact cars are somewhat larger than their North American equivalents, mostly because no supermini/subcompact size is manufactured by American, Mexican and Canadian car makers up to date.
By the late 1860's, Darwin came to describe this process as the survival of the fittest. This is very different from Lamarck's incorrect idea that the environment altered the shape of individuals and that these acquired changes were then inherited.
Spencer used the idea of survival of the fittest in biology and theorized human society had evolved the same way (Cooper 15). Social Darwinism, as Spencer's theory is called, pits everyone against each other to survive in the world where humans are soldiers in a war for survival.