We live in troubled times: climate crisis, war and authoritarian 'populism' are just some of the challenges we are currently facing. Never has there been such a need for a new approach to politics - nor such an opportunity for one. To create a world in which people thrive, we need to know what thriving is. Over the past century, psychotherapy - and its parent discipline, psychology - has built up a vibrant, nuanced and highly practical understanding of human wellbeing and distress. This book describes a progressive political approach that integrates insights from the psychotherapeutic and psychological domain, moving us from a politics of blame to a politics of understanding. In this vision of society - surrounded by a culture of radical acceptance - all individuals can live rich and fulfilling lives. We need those shaping our political landscape to understand psychological needs and processes more deeply to enhance our ability to work with others in a spirit of collaboration, dialogue and respect.