There is no such thing as economics, only social science applied to economic problems.

Integrative power [is] the ultimate power

The world moves into the future as a result of decisions, not as a result of plans. Plans are significant only insofar as they affect decisions.

The right to have children should be a marketable commodity, bought and traded by individuals but absolutely limited by the state.

In view of the importance of philanthropy in our society, it is surprising that so little attention has been given to it by economic or social theorists. In economic theory, especially, the subject is almost completely ignored. This is not, I think, because economists regard mankind as basically selfish or even because economic man is supposed to act only in his self-interest; it is rather because economics has essentially grown up around the phenomenon of exchange and its theoretical structure rests heavily on this process.

Reality, in its quantitative aspect, must be considered as a system of populations... The general study of the equilibria and dynamics of populations seems to have no name; but as it has probably reached its highest development in the biological study known as 'ecology,' this name may well be given to it.

If we saw tomorrow's newspaper today, tomorrow would never happen.