There were three main stages in the development of human settlements according to the document:
1. Early hunter-gatherer nomadic stage with no permanent settlements.
2. Development of grouping into nomadic bands for defense and hunting.
3. Permanent agricultural settlements emerged after the discovery of fire, tools, and agriculture. Specialization and development of arts and sciences occurred. Early structures included huts, tents, caves and megaliths like menhirs, dolmens and cromlechs. Architecture evolved from simple dwellings to planned villages.