Survival and reproduction of fittest.

A hypothetical alternative to the anthropic principle that attempts to explain the complexity of the universe

a book by Ronald Fisher which combines Mendelian genetics with Charles Darwin's theory of natural selection, with Fisher being the first to argue that "Mendelism therefore validates Darwinism"The Structure of Evolutionary Theory by Stephen Jay Gould, Chapter 7, section "Synthesis as Restriction" Gould quotes Fisher “The whole group of theories which ascribe to hypothetical physiological mechanisms, controlling the occurrence of mutations, a power of directing the course of evolution, must be set aside, once the blending theory of inheritance is abandoned.

Natural Selection 2 is a multiplayer video game which combines first-person shooter and real-time strategy rules.

an idea about genetic variance in population genetics developed by the statistician and evolutionary biologist Ronald Fisher.