Bill gates spoke on world-peace on 1-dec-2000 http://news.microsoft.com/2000/12/01/shaping-the-internet-age/

people are lucky to live now with progress than anytime in past history- BillGates to Steven Johnson https://www.youtube.com/watch?v=4_FN4fPU29o

bill gates on ebola - http://www.gatesnotes.com/Health/Ebola-Beyond-the-Headlines

official-linkedin-profile of bill-gates, he says "helping the world" (got this link from his official-website gatesnotes.com) http://www.linkedin.com/in/williamhgates