This book examines the links between work wage and wellbeing, drawing on the new specialism of Humanitarian Work Psychology and the United Nations Sustainable Development Goals (SDGs). Humanitarian work psychology foregrounds people before profit, not wages before people. It resonates with the SDGs through the Decent Work Agenda, a policy program that stresses a number of humanitarian concerns:  standards and rights at work, employment creation and enterprise development, social protection and social dialogue. These standards and forms of dialogue, from the living wage standard to new diplomacies for inclusive policy dialogue, appear and re-appear throughout the following chapters and sections in the book. The book synthesizes job characteristics models and psychology of working approaches with job evaluation techniques, poverty trap theory, diminishing marginal returns, work justice theory, the social psychology of equality and inequality, and a range of literatures on wellbeing that crisscross the social sciences.