Milton Friedman was more of a laissez faire economist. He was for minimizing the role of government in a free market as the means of creating political and social freedom. These ideas formed the basis of his book "Capitalism and Freedom" (1962). He is perhaps best known for promoting free markets and credited with modern currency markets. His flotation in unregulated and unpegged markets was to the tune of "money is worth what people think it is worth." His works were even circulated underground during the Cold War, and were the basis for a consumption-tax based economy rather than an income tax or wealth tax.