Jeffrey D. Sachs is a professor, author, and advisor to governments around the world and to the United Nations. He leads global efforts for sustainable development and climate safety. Sachs is a strong supporter of the Green New Deal and Medicare for All. He is an expert on public health and epidemics and has advised the World Health Organization at the highest levels during the past 20 years. Sachs helped to conceive and implement the Global Fund to Fight AIDS, TB, and Malaria.