The United States Navy controls all of the oceans of the world. — George Friedman

In the United States, minority populations were never an indigestible mass—with the major exceptions of the one ethnic group that did not come here voluntarily (African Americans) and those who were here when Europeans arrived (American Indians). The rest all came, clustered and dispersed, and added new cultural layers to the general society. This has always been the strength of the United States. In much of Europe, for example, Muslims have retained religious and national identities distinct from the general population, and the general population has given them little encouragement to blend. The strength of their own culture has therefore been overwhelming.

Japan must import all of its major minerals, from oil to aluminum. Without those imports-particularly oil-Japan stops being an industrial power in a matter of months.

If human beings can simply decide on what they want to do and then do it, then forecasting is impossible. Free will is beyond forecasting. But what is most interesting about humans is how unfree they are. It is possible for people today to have ten children, but hardly anyone does. We are deeply constrained in what we do by the time and place in which we live.