Book excerpt: Environmental, Social, and Governance (ESG) Investing: A Balanced Analysis of the Theory and Practice of a Sustainable Portfolio presents a balanced, thorough analysis of ESG factors as they are incorporated into the investment process. An estimated 25% of all new investments are in ESG funds, with a global total of $23 trillion and the U.S. accounting for almost $9 trillion. Many advocate the sustainability goals promoted by ESG, while others prefer to maximize returns and spend their earnings on social causes. The core problem facing those who want to promote sustainability goals is to define sustainability investing and measure its returns. This book examines theories and their practical implications, illuminating issues that other books leave in the shadows. Provides a dispassionate examination of ESG investing Presents the historical arguments for maximizing returns and competing theories to support an ESG approach Reviews case studies of empirical evidence about relative returns of both traditional and ESG investment approaches