Provides original findings from established longitudinal studies with findings and reflections that focus on understanding causes and manifestations of, and approaches to reduce, inequality.  It is critical that the wellbeing of society is systematically tracked by indicators that not only give an accurate picture of human life today, but also provide a window into the future for all of us. This important book presents impactful findings from twelve international longitudinal studies that respond to the United Nations Agenda 2030 commitment to 'leave no-one behind'. Exploring a wide range and complexity of global issues, it provides actionable strategies for policy makers and practitioners to strengthen the global Sustainable Development Goals (SDGs) framework and accelerate their implementation.