Today on Cause Talk Radio, Megan and Joe talk to William MacAskill, associate professor at Oxford University and author of a great new book: Doing Good Better. Will is one of the cofounders and leading voices of Effective Altruism, which he calls "Generosity for Nerds."

Effective Altruism is all about maximizing your positive impact on the world (through volunteering, charitable donations, etc.), and it's been getting a lot of traction lately.

Megan and Joe learned about Will from an excellent article in The Atlantic. Both Bill Gates and Washington Post blogger Ezra Klein have both recently tweeted about effective altruism.