It has been proposed that praxeology has potential not only as the foundation for growing the Austrian school of economics but other sciences as well. The utility of Austrian economics is immense, and similar achievements in other domains would be welcome.

However, it seems like a difficult task, as demonstrated by a recent effort to expand praxeology to psychology. The present article discusses the scope and power of praxeology and the conditions of psychological science.

Of all the leading libertarian French economists of the mid- and late nineteenth centuries, the most unusual was the Belgian-born Gustave de Molinari (1819-1912). Born in Liege, the son of a Belgian physician and a baron who had been an officer in the Napoleonic army, Molinari spent most of his life in France, where he became a prolific and indefatigable author and editor in lifelong support of pure laissez-faire, of international peace, and in determined and intrasigent opposition to all forms of statism, governmental control and militarism.

Today would have been Murray Rothbard’s ninety-seventh birthday. He was an unforgettable friend whose immense knowledge of many different fields was unsurpassed, in my experience. In a lecture on the Austrian theory of the business cycle, he mentioned the common objection that the expansion of bank credit might have no effect if investors anticipated trouble. After the lecture, I asked whether Mises had answered this point.