Millennial Generation’s 7 defining moments [Pictures]

Or when everyone’s business willingly became everyone’s business. Setting up shop in February 2004 and at first accessible only by college students, Facebook has quickly become a part of everyone’s lives. And our lives have become our digital lives, and vice versa. Millennials now have the compulsion to post their thoughts about everything -- from the weather to politics to sports to hairstyles -- and demand that people “like” it.   (AFP/Getty)