The term "Cradle of Civilization" refers to the Fertile Crescent (modern Iraq, Syria, Lebanon, Israel, Palestine, Jordan, Egypt, Turkey, Iran)—where urban life, writing, states, and complex societies first emerged (~3500–3000 BCE).
Parallel developments occurred in Indus Valley, China, Mesoamerica, Andes—but the Fertile Crescent is the earliest and most directly ancestral to Western/Eurasian civilization. The broader "Middle East" term (early 20th c.) encompasses this core plus surrounding regions.