Mr. Parker was the co-founder of Napster at age 19 and of Plaxo at 21. In 2004 he joined with Mark Zuckerberg to develop the online social network Facebook and served as Facebook’s founding president, and in 2007 he co-founded Causes on Facebook, which registered 180 million people to donate money and take action around social issues. In 2014, he announced his backing of Brigade, an online platform for civic engagement. Mr. Parker is also chairman and founder of the Economic Innovation Group, based in Washington D.C. He lives in Los Angeles with his wife Alexandra and their two children.