To enhance healthcare and reduce extreme poverty are the primary interest of Bill & Melinda Gates Foundation, the world’s largest private foundation in the world. The organization was of course founded by the world’s richest man and his wife, Bill and Melinda Gates.

There are three trustees of the foundation. Other than the couple, the third person is billionaire Warren Buffett. As of June 2013, the organization has an endowment of $38.3 billion. $28 billion of which was donated by Bill Ga...