Tanton served on the Board of Population-Environment Balance. Inc., which also supports Scenic Michigan, the International Dark-Sky Association, the Foreign Policy Association's Great Decisions Series, and the Harbor Springs chapter of the North Country Trail Association. Īdditionally, Tanton co-founded and was heavily involved in the Center for Immigration Studies (CIS), Numbers USA, the American Immigration Control Foundation, American Patrol/ Voices of Citizens Together, Californians for Population Stabilization, and ProjectUSA. Unable to secure support from colleagues in these groups to limit immigration, in 1979 he founded the non-profit Federation for American Immigration Reform (FAIR) with early support from Warren Buffett and Eugene McCarthy, with the promise that it would be 'centrist/liberal in political orientation'. He founded Petoskey chapters of the Sierra Club and Planned Parenthood and, for a time, became the national president of Zero Population Growth. He was the founder and patron of many anti-immigration non-profit organizations.

Tanton ran an ophthalmology practice in Petoskey, Michigan. in ophthalmology from the University of Michigan in 1964. from the University of Michigan in 1960, and received an M.S. Tanton graduated with a bachelor's degree in chemistry from Michigan State University in 1956, received an M.D. In 1945, he moved with his family to a farm northeast of Bay City, Michigan, on which his mother had been raised and on which he worked. 3.5 Southern Poverty Law Center criticism.

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