The Power of Half its Sunday collections to a local charity. Baumberger remarked: "What will we learn by practicing the power of half? What will this program teach our children and youth? I cannot wait to find out." Melinda Gates, wife of Microsoft founder Bill Gates, said she was inspired by the Salwens' philanthropic efforts. On December 9, 2010, Bill Gates, Mark Zuckerberg (Facebook's CEO), and investor Warren Buffett signed a promise they called the "Gates-Buffet Giving Pledge", in which they promised to donate to charity at least half of their wealth. After launching the Giving Pledge, the Gates invited the Salwens to Seattle
Bill & Melinda Gates Foundation spend more of their budgets on public health than on wars, that the foundation has donated at least $70 million to help improve nutrition and agriculture in Africa, in addition to its disease-related initiatives and that it is studying ways to improve the delivery of health care in Africa. Both insiders and external critics have suggested that there is too much deference to Bill Gates's personal views within the Gates Foundation, insufficient internal debate, and pervasive "group think." Critics also complain that Gates Foundation grants are often awarded based on social connections and ideological allegiances rather than based on formal