Historical inevitability.
Burch
Druin
D
D004632:Emergency Medical Services / Q000706:statistics & numerical data; D005086:Existentialism / Q000523:psychology*; D005260:Female; D006801:Humans; D019369:Life; D008149:Love; D008297:Male; D008393:Marriage / Q000523:psychology; D008678:Metaphysics