American businessman and chairman of BOK Financial Corporation, George B. Kaiser, has a net worth of $10.6 billion as of April 2019. The energy investor and longtime philanthropist joined the Gates/Buffett initiative in 2010. George Kaiser said,"I was blessed to be born in an advanced society with caring parents. So, I had the advantage of both genetics (winning the "ovarian lottery") and upbringing." Kaiser's foundation supports community health, early-childhood education and jail alternatives for mothers who commit nonviolent crimes."It is the government's responsibility to ensure at birth that every child has the same opportunity. But that is a hoax at this point," says Kaiser. "With what we know, it is morally offensive not to act." The  Tulsa's wealthiest man has acted by funding his George Kaiser Family Foundation with $4 billion over the past decade. It spends millions a year on medical clinics across Tulsa, helping women get off drugs, improving Tulsa's public schools, and developing early childhood education centers. His National Energy Policy Institute investigates ways to wean the U.S. off foreign oil. Controls energy giant Kaiser-Francis Oil; chairman and largest shareholder of BOK Financial. His family moved to Oklahoma after fleeing Nazi Germany; earned bachelor of arts and M.B.A. from Harvard.

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