Developing countries may not have full-fledged welfare states like those we find in Europe, but certainly they have welfare state systems. For comparative social policy research, the term welfare state systems has many advantages, as there are numerous different types/models of welfare state systems around the world. This revised and expanded second edition brings together leading experts to discuss social policy in 32 countries/regions around the world: from the most advanced welfare state systems in Scandinavia and Western Central Europe to the developing powers of Brazil, China, India, Indonesia, Mexico, and Russia. Country-specific chapters provide in general a historical overview, discuss major characteristics of the welfare state system, and analyze country-specific problems, as well as critical current and future trends for further discussions, while also providing one (additional) major focal point/issue for greater in-depth analysis. Including new country case studies on Mali, South Africa, Iceland, Spain, Italy, Greece, and Vietnam, this book is reframed around urgent contemporary issues including migration and rising social inequalities, LGBTQIA+ rights, universal basic income, and transboundary social policy. It will be of great interest to all scholars and students of social policy, social development, development economists and health economists, experts in public policy, health policy (including mental health policy), housing policy, education policy, family policy, cis- and trans-gender policy, migration and population policy, sociology, social work, anthropology, as well as social policy and public policy makers and administrators.