| Main Entry: | |
| Part of Speech: | noun |
| Definition: | theory of evolution |
| Synonyms: | Darwinianism, Darwinism, Neo-Darwinism, adaptation, evolution, evolutionism, law of the jungle, natural law, natural selection, organic evolution, phylogeny, punctuated equilibrium, social Darwinism, social evolution |
| Main Entry: | rat race |
| Part of Speech: | noun |
| Definition: | competition in life |
| Synonyms: | battle of life, daily grind, hamster cage, survival of the fittest, treadmill, vicious circle |
| Main Entry: | social Darwinism |
| Part of Speech: | noun |
| Definition: | social theories derived from evolution |
| Synonyms: | Darwinism, adaptation, evolution, law of the jungle, natural law, natural selection, phylogeny, social evolution, survival of the fittest, theory of evolution |