Every state begins in compulsion; but the habits of obedience become the content of conscience, and soon every citizen thrills with loyalty to the flag. The citizen is right; for however the state begins, it soon becomes an indispensable prop to order.
Will DurantThe experience of the past lives little doubt that every economic system must sooner or later rely upon some form of the profit motive to stir individuals and groups to productivity. Substitutes like slavery, police supervision, or ideological enthusiasm prove too unproductive, too expensive, or too transient.
Will Durant