The state of population (public) health in many countries and indeed the state of health at a global level are of major current concern. Despite advances in medicine and medical care and massive growth of the global economy, health in the world is characterized by widening disparities within and between countries; lack of access to even basic health care for billions of people, the emergence of multidrug-resistant tuberculosis, HIV, and many other new infectious diseases such as COVID19; rising costs of commercialized health care; changing health demographics with ageing populations and massive increases in the incidence of obesity and diabetes and other non-communicable diseases. Climate change and environmental degradation related to human activity are exacerbating these adverse health trends. In this course, students will learn to understand the substance and scope of 'global/planetary health' as distinct from international health, discuss the dimensions of forces shaping global/planetary health, identify the field of global/planetary health ethics, interrogate the normative dimensions of global/planetary health ethics, and analyze ethical challenges raised by many critical global health issues.