Social Good Summit

Digitally aware do-gooders such as American Red Cross social strategy director Wendy Harman, Earth Institute director Jeffrey Sachs and UNESCO goodwill ambassador Forest Whitaker will attend this third annual symposium dedicated to bettering the world through social media. If you can't make it to the three-day event, held in conjunction with U.N. Week, the dozens of talks, panels, Q&As and case-study presentations will be live-streamed at livestream.com.