In our increasingly polarized world, collaboration has become both more important and more difficult. To tackle the issues that matter most—from climate change to workplace conflict—we often must work with people we disagree with, dislike, or distrust. To do so, we need a fundamental shift in how we think about and approach collaboration. Drawing on over 30 years of global experience, Adam Kahane challenges the myth of harmonious teamwork and offers a revolutionary approach that embraces discord, experimentation, and genuine co-creation.