en
Bill Gates , one of our nation &apos;s wealthiest individuals , in his Harvard commencement speech , talked about the problem of inequality facing society as being the most daunting challenge , and talked about what must be done to combat it , saying , &quot; &quot; Humanity &apos;s greatest advances are not in its discoveries — but in how those discoveries are applied to reduce inequity . &quot; &quot; And there &apos;s the Giving Pledge , in which more than 100 of our nation &apos;s wealthiest individuals are pledging half of their fortunes to charity .