... an American professional boxer who won a lot of medals in the light heavyweight division.

During the career, ... earned 4.5 million dollars.

Less than 20 years ... became homeless, had problems with the law, and wasted most of his earnings on drugs.

... nicknamed the witch of Wall Street.

... made a fortune buying real estate, investing in railroads and mines, and lending money to others.

... thriftiness was legendary but generosity was private and real.

... and his busuness partner founded and built the world's largest software business.

... invested $80 million into the development of a "smart city" near Phoenix Arizona.

... foundation will also invest $1 billion by 2023 to fund research to end malaria.

... has received numerous awards for philanthropic work.