This concluding chapter argues that Classical Liberal methodology is defined more by an attitude than it is by a particular methodological approach. That attitude blends a deep-seated skepticism of mainstream theory—often manifested by heterodox economists—with an appreciation of the gains that have been made by mainstream theory, an appreciation generally lacking among heterodox critics. A Classical Liberal attitude would also display a mutual respect for the methods that have evolved in mainstream and non-mainstream traditions to handle theoretical problems. The chapter then presents six economists who displayed a Classical Liberal attitude to methodology in important aspects of their work: Edward Leamer, Ariel Rubinstein, Alvin Roth, Paul Romer, Amartya Sen, and Dani Rodrik.