This set includes 4 books in a slipcase. Mises attributes the tremendous technological progress and the consequent increase in wealth and general welfare in the last two centuries to the introduction of liberal government policies based on free-market economic teachings, creating an economic and political environment which permits individuals to pursue their respective goals in freedom and peace. Mises also explains the futility and counter-productiveness of government attempts to regulate, control, and equalise all people's circumstances: "Men are born unequal and...it is precisely their inequality that generates social cooperation and civilisation."