Barry Goldwater's journals, reviewed at Reason. (h/t, Insty.) One quote:
Goldwater was for liberty, as he conceived of it. “Our country, of course, was born on the very simple idea that freedom is our only cause,” he wrote in his journal, “and that freedom was not given to us by government.” In another entry, he declared, “The American economic system could only work well, and at its best, when it was unhampered by government and was allowed to be controlled only by the marketplace.… Thus, the core of my economic philosophy is the free market system—when it is working as it should.”