Commentators grafted the Darwinian concept of "survival of the fittest" onto notions of social class. This can be explained through the evolutionary psychology concept called survival of the fittest. "Survival of the fittest" is sometimes claimed to be a tautology. Vonnegut also often laments social Darwinism, and a "survival of the fittest" view of society. Also a notable biologist, Spencer coined the term "survival of the fittest". It is underlined by the survival of the fittest. Today, this is called the theory of survival of the fittest. Shishio then explained his creed of survival of the fittest and gives him his sword. His early life turned into a game of survival of the fittest. Others believe it is related to hierarchy, and "survival of the fittest". Sith emphasize "survival of the fittest" and view restraint as a weakness. This left only the fittest and strongest to survive and serve out their military service. He was the first winner of ROH's annual Survival of the Fittest tournament in 2004. "Survival of the Fittest Live" was recorded using the following lineup. She is also, similarly, a firm believer in survival of the fittest.