This document provides a brief overview of human migration and the development of civilization from the Paleolithic Era to ancient empires. It notes that around 100,000 years ago, Homo sapiens began migrating out of Africa, eventually settling on Pacific Islands. After the last ice age ended 16,000 years ago, settlements developed where people grew plants, raised animals, and developed basic tools. Some of the earliest cities included those of the Sumerians, who created one of the first writing systems, and the Egyptians, who built pyramids and were ruled by pharaohs. It then discusses the Greco-Persian Wars between 500-499 BC, the expansion of the Chinese Qin Dynasty, and