thinking about chronology By jpegmafiaglazer 3500 BCE Civilizations become worldwide Period: 3500 BCE to 3000 BCE One of the earliest civilizations in Sumer emerged Period: 3400 BCE to 3200 BCE Nubian civilization develop independently 3100 BCE Several states in Egypt merge into one territory Period: 3000 BCE to 2000 BCE Indus Valley Civilization arises Period: 3000 BCE to 1800 BCE Norte Chico (Peru) emerges 2200 BCE Xia, Shang, & Zhou Dynasties define the first civilizations in China 2200 BCE First civilization in Central Asia (Oxus) 1700 BCE Collapse of Indus Valley Civilization 1650 BCE Foreigners Migrate into Nile Valley 1595 BCE Hittites conquer Babylonian Empire 1500 BCE Egypt becomes imperial state 1200 BCE First Olmec civilization forms 900 BCE Olmecs create first written language in the Americas