The book “Alliances for sustainable futures” contains a historical overview of alliances and a description of different forms of alliance. The advantages and disadvantages of alliances are discussed, and success and failure factors are described. Four chapters go more deeply into four life stages of forming, building, developing and evolution of alliances. Each of these chapters starts with practical examples, followed by an in-depth look at how tensions and paradoxes have been dealt with. Next, learnings are described that are helpful in maintaining the vitality of purpose-driven alliances. The concluding chapter looks back at the strength and scope of purpose-driven alliances and looks ahead at how these partnerships can contribute to a valuable and sustainable future. In the book readers find answers on question like: Where do I start and how do I form an alliance? How do I bring the right people together? How do I ensure that an alliance has impact? How do I respond to unexpected events? What can I do to keep the alliance vital and resilient?