Library of the Works of Ludwig von Mises”. Here is an article he wrote in 1951, some two years after his magnum opus Human Action appeared, where is lays out his case in a more popular form. The money sentences are “Economic theory has demonstrated in an irrefutable way that a prosperity created by an expansionist monetary and credit policy is illusory and must end in a slump, an economic crisis. It has happened again and again in the past, and it will happen in the future, too.