What was the approximate world population from 4000 B.C. to 2000 B.C.?

Answer 1

From 4000 B.C. to 2000 B.C., the world population is estimated to have grown from about 5 million to approximately 20 million people. This growth was gradual, influenced by the development of agriculture and settled communities, which allowed for more stable food supplies. By 2000 B.C., urbanization was beginning to take shape, particularly in regions like Mesopotamia and the Indus Valley, contributing to increasing population densities. However, overall growth remained relatively slow compared to later periods.