This book looks at the principal routes taken for sustainable investing, while providing guidance to investors. It traces the evolution of sustainable investment in its many forms from philanthropic causes through more targeted forms such as ESG (environmental, social and governance) investing to Impact Investing. The book examines the United Nations Sustainable Development Goals (SDGs) as a driver of significant transformation in the arena of sustainable investment and also how private capital can complement government funds in financing the Goals. It provides an analysis of the different forms of sustainable investment, the principal players involved in, and presents what is on its way to becoming an investment 'revolution'. The book’s focus is Asia however some of the lessons learned and conclusions drawn are of universal validity. It looks at the role of government as well as of investors in facilitating and financing sustainable investment, and it showcases stories of sustainable investment from various parts of Asia.