Adam Smith's key insight was that both parties to an exchange can benefit and that, so long as cooperation is strictly voluntary, no exchange can take place unless both parties do benefit.
Milton FriedmanEconomic freedom is ... an indispensable means toward the achievement of political freedom.
Milton FriedmanComplete free trade is not politically feasible. Why? Because it's only in the general interest and in no one's special interest.
Milton FriedmanI am myself persuaded, on the basis of extensive study of the historical evidence, that... the severity of each of the contractions - 1920-21, 1929-33, and 1937-38 - is directly attributable to acts of commission and omission by the Reserve authorities and would not have occurred under earlier monetary and banking arrangements.
Milton Friedman