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Everywhere the first impulse to social action is given as a rule by real interests, i.e., by political and economic interests. Ideal interests lend wings to these real interests, give them a spiritual meaning, and serve to justify them. Man does not live by bread alone. He wants to have a good conscience as he pursues his life-interests. And in pursuing them he develops his capacities to the highest extent only if he believes that in so doing he serves a higher rather than a purely egotistic purpose. Interests without such “spiritual wings” are lame; but on the other hand, ideas can win out in history only if and insofar as they are associated with real interest
Timothy S. Lee (Wed,) studied this question.