Higher crop yields allows agricultural societies to support very large populations. This also enables many people to work in specialized roles. The fifth division of society is industrial. The emphasis of an industrial society changes from the production of food to the population of manufactured goods. This change is made possible by the use of machines in the production of goods.
Industrialization also encourages urbanization, the concentration of the population in cities.
The final division of society is postindustrial. The United States, in its current condition, is considered to be a postindustrial society. In a postindustrial society, a large portion of the economy is involved with the production of information and services. Postindustrial societies also place strong emphasis on the roles of science and education in society. Analysis Sociologists have grouped hunting and gathering, pastoral, horticultural, and agricultural societies into one main group, called pre-industrial societies.