it was a period of a lifestyle that revolved around hunting and gathering agriculture. it was also known as the agricultural revolution. it begun about 12,000 years ago.
Can you include some more details?
Answer:
Aryans from central Asia invaded South Asia and introduced the caste system as a means of controlling the local populations.
Ahmose rose to power when Egypt was in crisis. There was occupations in the North and invasion threats in the South.
Ahmose's army was able defeat the invaders in the North (Hyksos) and the threat in the South (Nubians), taking the Nubians territory and creating an united and powerful Egypt.