How can we do the most good for the world? | Will MacAskill

Of all the problems facing humanity, which should we focus on solving first? In a compelling talk about how to make the world better, moral philosopher Will MacAskill provides a framework for answering this question based on the philosophy of "effective altruism" -- and shares ideas for taking on three pressing global issues.
by contact@ted.com (TED) via TED Talks Daily (SD video)