Murray Newton Rothbard, Anatomy of the State — What the State Is (1974)
“ The only way by which man can do this is by the use of his mind and energy to transform resources ("production") and to exchange these products for products created by others. Man has found that, through the process of voluntary, mutual exchange, the productivity and hence, the living standards of all participants in exchange may increase enormously. The only "natural" course for man to survive and to attain wealth, therefore, is by using his mind and energy to engage in the production-and-exchange process. ”
