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- Simran Kaler, An Humanist, Indian Documentary Film Maker, author, playwright, and social activist.
- Margaret E. Kuhn, American activist known for founding the Gray Panthers movement in August 1970. Given the title, "Humanist of the Year" in 1978 by the American Humanist Association.
- Paul Kurtz co-authored Humanist Manifesto II.
Read more about this topic: List Of Humanists