1) Humans migrated out of Africa starting 100,000 years ago, reaching the ends of the Earth by 1500 years ago.
2) An Agricultural Revolution began after the last Ice Age, where humans settled and began growing plants and domesticating animals, developing small settlements.
3) The first civilizations emerged around 3500-3000 BC in Sumer, Egypt, China, and Peru, marked by developments like writing, trade, pyramids, and organized governments.