Where should you start if you are faced with massive systemic challenges or want to cultivate a shift towards sustainability in global systems? Where are the leverage points for systemic change? This book provides examples of what organisations and companies like the Sustainable Shipping Initiative, WWF and Nike are doing, along with practical strategies and an overview of system change theory. Section one outlines systems thinking, especially how we can use a ‘living systems’ perspective as a tool to understanding sustainability and change. Section two pulls out practical strategies for action from theoretical models and ''must-read'' literature. Section three illustrates how organisations are implementing these strategies -- including examples from the Sustainable Shipping Initiative, Nike, Sustainable Food Lab, Finance Innovation Lab, Shell Foundation and Rockefeller Foundation. Section four provides tips for you as a practitioner navigating this territory. Many of the ideas behind cultivating system change can be difficult to understand until they are put into practice. This ''practitioner''s companion'' ends with questions that will prompt reflections and spur you to action. Keep it to hand as you change the system!