Opportunities to "have your say," "get involved," and "join the
conversation" are everywhere in public life. From crowdsourcing and town hall
meetings to government experiments with social media, participatory politics increasingly
seem like a revolutionary antidote to the decline of civic engagement and the
thinning of the contemporary public sphere. Many argue that, with new
technologies, flexible organizational cultures, and a supportive policymaking
context, we now hold the keys to large-scale democratic revitalization.