B.C. 5000 -| EGYPTO-BABYLONIAN |- -| OR |- -| ANCIENT ERA |- -| |- Building of the Pyramids. -| |- Earliest monuments to kings B.C. 4500 -| |- in Babylonia. -| |- -| |- -| |- -| |- B.C. 4000 -| |- Rise of Semitic Babylonian -| |- kingdoms. -| |- -| |- -| |- B.C. 3500 -| |- Chaldæan Astronomy. -| |- -| |- -| |- -| |- B.C. 3000 -| |- -| |- -| |- -| |- -| |- B.C. 2500 -| |- -| |- -| |- -| |- Khammurabai. -| |- Assyrian records. B.C. 2000 -| |- -| |- -| |- -| |- -| |- B.C. 1500 -| |- Hebraic Monotheism. -| |- -| |- Zoroaster. -| |- Ægean Culture. -| GRECO-ROMAN OR |- B.C. 1000 -| CLASSICAL ERA |- Hellenic Culture. -| |- -| |- -| |- -| |- Thales. B.C. 500 -| |- Buddha. Confucius. -| |- Socrates. -| |- Plato. Aristotle. -| |- Stoics and Epicureans. -| |- A.D. 1 -| |- -| |- Christianity. -| |- -| |- Neo-platonists. -| |- A.D. 500 -| |- St. Augustine. -| DARK |- -| AGES |- Mohammed. -| |- -| |- Johannes Scotus. A.D. 1000 -| |- Avicenna. -| |- Scholasticism. -| MEDIÆVAL OR |- Anselm. Abelard. -| SCHOLASTIC ERA |- Aquinas. R. Bacon. -| |- Wiclif. A.D. 1500 -| MODERN |- Copernicus. Luther. -| SCIENTIFIC |- Francis Bacon. Newton. -| ERA |- -| |- Kant. Steam. A.D.