paleolithic
3 million bc to 10,000 bc first humans and fire were found during that time.
neolithic
10,000 to 3000 bc. Beginning of agriculture and first urban civilization.
Ancient age
3000 BC to 476 ad Invention of writing and fall of the Persian empire
medieval age
476 to 1492 ad fall of western roman empire printing press and division of Mongolian empire. 1492 is when Columbus discovers America. fall of the Byzantine empire
Modern age
1492 AC to 1789 Ac Catholic church reforms.
Contemporary
1789 Ac to present WW1 WW2 fall of the berlin wall French revolution.