Within the last 50 years Singapore managed to change its water situation from dirty waterways, water shortages, and no water storage to a world known blue and green city, with innovative approaches to clean water, and full coverage of water needs. Now Singapore is known for being a Hydro Hub. Its neighboring country Indonesia, which faces the same geographical climate issues, is currently in a similar situation Singapore was 50 years ago. It struggles with polluted water and has difficulties to provide access to water with clean drinking water to its citizens. How can these two neighboring country be different in their approach to water management? This book aims to examine the dynamics of each countries' water management through the lens of co-evolutionary theory of economics. Sustainable Driven Entrepreneurship (SDE) serves as means to map out the overall modus operandi of each country and its viability for the future of the country.