Book excerpt: "Thirty-nine authors from around the world explore the phenomena of citizen journalism, collective action, 'smart mobs,' iconography, and even the revolutionary music of the Arab Spring in Social Media goes to War: rage, rebellion, and revolution in the age of Twitter. Twenty-eight chapters from senior and junior social media scholars cover war, insurrections, revolutions, and quests for social justice through case studies of Cuba, Georgia, Egypt, India, Iran, Jordan, Thailand, Tunisia, and the United States, where President Obama's social media usage is scrutinized by a former campaign insider. The U.S. Department of Defence's social media policies in time of conflict are reviewed, and social media usage in Wisconsin's budget battle of 2011 is analyzed."--Cover, p. [4]