Wael Ghonim talk about the graphic organizer in ted, he talk about five critical challenges facing today's social media, First, you don't know who's the rumors, we don't know how to deal with rumors, rumors that confirm people's baises are now believed and spread among millions of people, Second, we create our own echo chambers, we tend to only communicate with people that we agree with, Third is Online discussions quickly descend into angry mobs, all of us problably know that, Fourth, it became really hard to change our opinions, of the speed aned brevity of social media, And fifth is, social media things get shallow and this is the most critical, our social media experiences are designed in a way that favors broadcasting over engagement. It became clear to me that while it's true that polarization is primarily driven by our human behaviors.