1. Early humans evolved in Africa and migrated throughout the world beginning around 200,000 BCE.
2. During the Paleolithic period from 250,000 to 9,000 BCE, humans lived in hunter-gatherer societies and were dependent on their environment for survival.
3. Around 9,000 BCE, the Agricultural Revolution began as humans in the Fertile Crescent developed practices like planting seeds and domesticating animals, allowing for more settled lifestyles and population growth.