1. In Africa and the Middle East, new crops enabled the growth of large civilisations (wheat).
2. However, there was also more competition for land, wars etc.
3. Nth American tribes often had a nomadic existence.
4.In SE Asia, geography, terrain and jungle combined to create pockets of civilisation and limit waves of expansion, unlike the plains of the middle east. For example, take Papua NG, where each valley still speaks a different dialect and remained in Stone Age isolation until the 1940s.
2. However, there was also more competition for land, wars etc.
3. Nth American tribes often had a nomadic existence.
4.In SE Asia, geography, terrain and jungle combined to create pockets of civilisation and limit waves of expansion, unlike the plains of the middle east. For example, take Papua NG, where each valley still speaks a different dialect and remained in Stone Age isolation until the 1940s.