chapter  9
Environments and Adaptations: Then and Now: Charles Crawford
Pages 28

The world we live in is not what it was when our anatomy and physiology took their present form. If we compare our environments to those of modem hunter-gatherers (which may be more similar to our current environment than that of our Pleistocene ancestors), we find that population densities are greater; social, economic, and political structures are more complex; group sizes are larger; and the range of altitudes and latitudes inhabited is greater. Multinational corporations now dominate the production of goods and services. Industrial pollution is a serious problem in almost every part of the world. International conflicts seem to be a normal part of our lives. These, and a plethora of other differences, interact to produce a world that our Pleistocene ancestors would likely find strange and unnerving.