Each individual in a society is a nexus where innumerable relationships of this character intersect.

Our political organization, based as it is on an eighteenth-century separation of powers and on a nineteenth-century nationalist state, is generally recognized to be semiobselete.

For years I have told my students that I been trying to train executives rather than clerks. The distinction between the two is parallel to the distinction previously made between understanding and knowledge. It is a mighty low executive who cannot hire several people with command of more knowledge than he has himself.

I came into history from a primary concern with mathematics and science. This has been a tremendous help to me as a person and as a historian, although it must be admitted it has served to make my historical interpretations less conventional than may be acceptable of many of my colleagues in the field.

This priesthood became a closed group, able to control enormous wealth and incomes, and concerned very largely with the study of the solar and astronomical periodicities on which there influence was originally based. With the surplus thus created, the priesthood was able to command human labor in huge amounts and to direct this labor from the simple tillage of the peasant peoples to the diversified and specialized activities that constitute civilized living.

The basis of social relationships is reciprocity: if you cooperate with others, others will cooperate with you.

No slave system has ever been able to continue to function on the slaves provided by its own biological reproduction because the rate of human reproduction is too slow and the expense from infant mortality and years of unproductive upkeep of the young make this prohibitively expensive. This relationship is one of the basic causes of the American Civil War, and was even more significant in destroying ancient Rome.