Controversies at the intersection of history and ethics, centering on the legitimacy of state intervention in matters of individual rights in the name of the common good. Topical expertise includes smoking, HIV, tuberculosis, leprosy, surveillance, privacy, immigration, and the politics of fear/panic/crisis. Op-eds published in NY Times, Huffington Post, and others; media appearances on NPR, New York Public Radio, CNN; major scholarly publication in Science, New England Journal of Medicine, Journal of the American Medical Association, Health Affairs, American Journal of Public Health, and others.