Dr. Keller is a renowned scholar and teacher of the intersections of history, society, medicine, and public health, with a particular focus on the historical and societal dimensions of climate change, natural disasters, widespread disease, and colonialism. Among other works, he has written the acclaimed books “Fatal Isolation: The Devastating Paris Heat Wave of 2003” and “Colonial Madness: Psychiatry in French North Africa.” He has authored essays and articles for mainstream media outlets, such as The Washington Post and Scientific American, on death and healing related to COVID-19 and natural disasters. His current research focuses on a global history of the environment and how social and economic factors have impacted the ecologies of diseases like HIV and Lyme disease. We welcome him into his new role in the Department.