Karl Hess (1923–1994) was an American national-level speechwriter and author. His career included stints on the Republican Right and the New Left before he became a libertarian anarchist.
The documentary film Karl Hess: Toward Liberty won the Academy Award for best short documentary in 1981.
Ludwig von Mises: "Interest is the difference in the valuation of present goods and future goods; it is the discount in the valuation of future goods as against that of present goods." - Planning for Freedom