William Ruger talks about his reasons to write the book Milton Friedman, which is part of the series Major Conservative and Libertarian Thinkers, and during the conversation, he makes reference to the importance of such character for the history of the classical liberal, political and economic thought. Ruger also sets out the work of this economist and statistician on the relationship between economics and political freedom. He comments on three problems he encountered when writing the book; the first was being deployed to Irak, the second was the voluminous amount of material written by Milton Friedman, and the third was the difficulty of working on his economic thought, since Ruger is not an economist but a social scientist. The interview concludes with the discussion of the influence of this figure in the economy of the twenty-first century.