People in need (PIN) NGO recently published a practical and concise Behaviour Change Toolkit. This toolkit is designed to give international development practitioners the know-how they need to understand people’s behaviours and to help people to make positive changes in their lives. It highlights how behaviour change is key to addressing many development issues such as child mortality, food insecurity, lacking education, and gender inequality, and offers practical and easy-to-read guidance on how to go about developing a behaviour change intervention. It is based on insights gained from decades of research and the practical experience of development workers and social scientists into what determines how people behave.