survival of the fittest

noun 0.729

evolution

noun 0.649

selective breeding

noun 0.633

selectionist

noun 0.610

survival

noun 0.597

evolutionary theory

noun 0.583

speciation

noun 0.578

selection

noun 0.573

adaptationism

noun 0.569

naturalism

noun 0.567

adaptation

noun 0.566

evolutionism

noun 0.559

eugenics

noun 0.556

selectivity

noun 0.554

superselection

noun 0.551

natural history

noun 0.546

evolutionary biology

noun 0.542

predation

noun 0.541

microevolution

noun 0.539

natural function

noun 0.538

genetic drift

noun 0.536

coevolution

noun 0.536

natural transformation

noun 0.529

instinct

noun 0.528

social evolutionism

noun 0.525

heredity

noun 0.524

population genetics

noun 0.520

naturalist

noun 0.519

biodiversity

noun 0.518

preselection

noun 0.516

natural science

noun 0.516

survivalism

noun 0.515

creationism

noun 0.514

biological determinism

noun 0.513

extinction

noun 0.510

self-preservation

noun 0.510

adaptationist

noun 0.508

natural law

noun 0.505

orthogenesis

noun 0.505

sociobiology

noun 0.502

succession

noun 0.502