The book focuses on the macroeconomics of sustainable development and the extension to energy, water and food security, using a system dynamics approach. The work is divided into three related parts that build a narrative concerning the interaction between economics, policy, natural resources and society. First, a simple system comprising three coupled differential equations is used to explain the effects of macroeconomic business cycles on the exploitation of ecological resources, and from this is inferred an implied importance of averting business cycles. The second part establishes a system methodology inspired by Post Keynesian economics to develop the Murray-Darling Basin Economy Simulation Model that links food production/water users and food consumers at the micro scale, to the macroeconomic system dynamics. The third, and final, part presents the development of an "Asian Food Security Risk Engine" that predicts the threat of civil unrest from food insecurity in Asian developing countries.