Henry Stuart Hazlitt (Philadelphia 1894 - Fairfield, Conn. 1993) was an American conservative economist, writer, journalist, libertarian philosopher and tireless advocate for free markets.
Hazlitt wrote some 24 books and an estimated 10,000 editorials, columns and articles in his lifetime; his most renowned book is: Economics in One Lesson. He also authored The Foundations of Morality, The Failure of the New Economics, Will Dollars Save the World? and Man vs. The Welfare State. He completed his final book, on the Stoic philosophers, when he was 90 years old.  In the simplest language, rarely citing statistics, he laid out what he called the fallacies of regulating economic activity -- like trying, for example, to raise wage levels through minimum wage laws or union bargaining. 
The art of economics consists in looking not merely at the immediate but at the longer effects of any act or policy; it consists in tracing the consequences of that policy not merely for one group but for all groups.
The only real cure for poverty is production.
He married Frances S. Kanes, who died in 1991.