Conflicting economic interest is relatively unimportant as a cause of war.

If all properly economic problems were solved once for all . . . the social struggle and strife would . . . [not necessarily] be reduced in amount or intensity . . . in the absence of some moral revolution which could by no means be assumed to follow in consequence of this change itself.

It is true practically if not altogether without exception that the changes studied by any science tend to equilibrate or neutralize the forces which bring them about, and finally to come to rest.

We have to adapt and overcome, that's all we can do.

...even professors of economics, to say nothing of the public, do not generally have scientific minds.

Knowledge is more a matter of learning than of the exercise of absolute judgment. Learning requires time, and in time the situation dealt with, as well as the learner, undergoes change.

Costs merely register competing attractions.