Rising societal inequalities and climate change are two of the most important challenges facing the world today. “The cry of the Earth and the cry of the poor” are intimately related and together have immense implications for health and wellbeing in general, and even more so for the health and wellbeing of the marginalised. In this course we examine the inter-related historical determinants of social inequality and climate change to understand how and why we have reached the contemporary crisis and the implications of this crisis for health inequality. We reflect on the ideas of social justice and the common good to understand what the current state of the world tells us about who and what we collectively value and use this as a framework to re-imagine how we would like our world to look. Finally, we apply tools from public economics, game theory and public choice theory to understand and model possible solutions to the collective action problems that lie at the heart of these crucial issues and can help us begin to progress towards our re-imagined futures. The course will take a hands-on approach with students working in groups to build policy simulation models in the form of a board game to synthesise, draw insights from and critically engage with the key ideas covered in the course.