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.
In Chapter 4 of the 5th edition of The Origin published in 1869, Darwin implies again the synonym: Natural Selection, or the Survival of the Fittest. By the word fittest Darwin meant better adapted for immediate, local environment, not the common modern meaning of in the best physical shape (think of a puzzle piece, not an athlete).