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- Ronnie Barker: (1929–2005) British comedian.
- Jeremy Bentham: English author, jurist, philosopher, and legal and social reformer. He became a leading theorist in Anglo-American philosophy of law, and a political radical whose ideas influenced the development of welfarism. He is best known for his advocacy of utilitarianism and animal rights, and the idea of the panopticon.
- Marshall Berman: American political scientist and Marxist humanist.
- Niels Bohr: Danish physicist who made foundational contributions to understanding atomic structure and quantum mechanics, for which he received the Nobel Prize in Physics in 1922.
- Hermann Bondi was a Humanist Laureate in the International Academy of Humanism.
- Jacob Bronowski: Polish-British polymath and author of The Ascent of Man.
- Lester R. Brown: American environmental analyst, founder of the Worldwatch Institute, and founder and president of the Earth Policy Institute, a nonprofit research organization based in Washington, D.C.. Given the title, "Humanist of the Year" in 1991 by the American Humanist Association.
Read more about this topic: List Of Humanists