The development of mortars from querns could be considered an example of specific evolution. Hunting and gathering societies became extinct between 10,000 and 5000 years ago. The dwellings at Monte Verde were small, mud-brick structures. Mexico is a South American country. Domesticated animals are usually larger and more intelligent than their wild ancestors.
Tribal societies can include sedentary communities.
Hierarchies in ascribed rank and status are a common feature in egalitarian societies. Population pressure is a constant in human societies because there is no mechanism for slowing their rate of growth. A. Domesticated animals were far more important in the Fertile Crescent than they were in ancient Mexico. B. Ancient Mesopotamians used irrigation to improve yields of maize harvests. C. Agriculture occurred in the New World thousands of years earlier than it did in the Old World.