Asia
The coastal periphery was home to some of the world's earliest known civilizations, each of them developing around fertile river valleys. The civilizations in Mesopotamia, the Indus Valley and the Yellow River shared many similarities. These civilizations may well have exchanged technologies and ideas such as mathematics and the wheel. Other innovations, such as writing, seem to have been developed individually in each area. Cities, states and empires developed in these lowlands.
History of Western civilization before AD 500
The earliest urban civilizations of Europe belong to the Bronze Age Minoans of Crete and Mycenaean Greece, which ended around the 11th century BC as Greece entered the Greek Dark Ages. Ancient Greece was the civilization belonging to the period of Greek history lasting from the Archaic period of the 8th to 6th centuries BC to 146 BC and the Roman conquest of Greece after the Battle of Corinth. Classical Greece flourished during the 5th to 4th centuries BC. Under Athenian leadership, Greece successfully repelled the military threat of Persian invasion at the battles of Marathon and Thermopylae. The Athenian Golden Age ended with the defeat of Athens at the hands of Sparta in the Peloponnesian War in 404 BC.