From the article: a landscape of new, youth-led organizations now populates the political domain. Their tactic of choice is participatory politics, which they pursue through the disintermediating power of digital media for grass-roots organizing. Using an array of tools — from protests to memes to agitprop — they seek to change the public agenda, mobilize the marginalized and advocate policy reforms. A network of loosely affiliated organizations, whose links are growing tighter, has been pursuing racial justice for nearly a decade now, right under the noses of the mainstream media.