The higher you rank on the socioeconomic ladder, the better your health, and consequently the longer you can expect to live. That's according to Sir Michael Marmot, Professor of Epidemiology and Public Health at University College London, who was invited to RACS’ 2018 Annual Scientific Congress in Sydney to discuss inequalities in the developing world. Sir Michael, for years a leading researcher on health inequality, insists some of the biggest inequities occur in the world's richest nations, including Australia.