Social networking sites have evolved rapidly over the past ten years, alongside Internet-savvy grassroots organizations like MoveOn.org, 350.org, the Sunrise Movement, Black Lives Matter and Fridays for Future. The course outlines the changing role of celebrities in promoting social causes and the viral nature of Internet trends. What is the link between virality, hashtag movements and social change? We consider questions about the nature of the "collective generosity" mindset inherent in millennial offerings like Wikipedia, crowdfunding and everyday heroes. How can digital and information networks include the most disenfranchised of global citizens in mapping opportunities for sharing resources? How can the activist potential of the Internet be used to amplify solutions to global warming, poverty, and political injustice?