This book aims to define comparative economics and to illustrate the breadth and depth of its contribution. It starts with an historiography of the field, arguing for a continued legacy of comparative economic systems, which compared socialism and capitalism, a field which some argued should have been replaced by institutional economics after the fall of the Berlin Wall. The process of transition to market capitalism is reviewed, and itself exemplifies a new combination of comparative analysis with a focus on institutional development. Going beyond, chapters broadening the application of comparative analysis and applying it to new issues and approaches, including the role and definition of institutions, subjective wellbeing, inequality, populism, demography, and novel methodologies. Overall, comparative economics has evolved in the past 30 years, and remains a powerful approach for analyzing important issues.