Thales. c624-546BC. Greek philosopher/scientist. Predicted eclipse, 585. First to enunciate the existence of natural laws of science. Water as basis of all matter. Critical discussion leads to knowledge. Static electricity.

Turner, Nat. 1800-31. US slave. Led revolt 1831, killing 51 whites. Repressive laws vs slaves enacted.

Usury. Maximum interest rates: Rome 50BC: 12%, 529: 8%. Islam 622: 0%. Christian 1311: 0%. England: 1623 8%, 1651 6%, 1713 5%, 1854 eliminated. USA, by State: 5-45%