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.
Herbert Spencer first used the phrase â after reading Charles Darwin's On the Origin of Species â in his Principles of Biology of 1864 in which he drew parallels between his economic theories and Darwin's biological, evolutionary ones, writing, This survival of the fittest, which I have here sought to express in mechanical terms, is that which Mr. Darwin has called 'natural selection', or the preservation of favored races in the struggle for life.