431 BC

 Centuries: 6th century BC – 5th century BC – 4th century BC

Decades: 480s BC 470s BC 460s BC 450s BC 440s BC – 430s BC – 420s BC 410s BC 400s BC 390s BC 380s BC

Years: 436 BC 435 BC 434 BC 433 BC 432 BC – 431 BC – 430 BC 429 BC 428 BC 427 BC 426 BC

Events

• Beginning of the Peloponnesian War
• The Greek physician and philosopher Empedocles articulates the notion that the human body has four humors- blood, bile, black bile, and phlegm, a belief which dominates medical thinking for centuries.

Births

Deaths