This book fills a much-needed gap in the existing literature on public policy by fusing complexity theories with communication practices (where behaviour is a unit of analysis). The book aligns with the behaviourial foundations of policy making and goes further by exploring the what, why and how.a The book focuses on three aspects of policy making i.e. complexity issues in relation to public policy and communication related issues, the application of communication strategies to manage complex public policies and finally, the importance of institutions in policy making process and issues management. It is a wonderful resource to help policy makers to anticipate, and better plan for, complexity, polarisation and other human behaviour that arise in the policy making process.