On June 15, 2012, President Barack Obama stunned even the most optimistic of a generation of young immigrants with his words, “it makes no sense to expel talented young people who, for all intents and purposes, are Americans.” Just about this time, a near audible cacophony of “Si, Se Puede!”s echoed from east to west coast.

Much reaction to this announcement of a two-year reprieve of deportation proceedings for children of undocumented parents has–perhaps cynically–centered on the political strategizing behind the president’s decision. But the back story is about the DREAMers. The name derives from the proposed legislation, the Development, Relief, and Education for Alien Minors (DREAM) Act, which has been introduced in Congress for more than a decade, but never passed. How were these young activists able to move a campaign over a single issue (the right for those who were brought into the country without official papers as children to regularize their status) to become the linchpin of a larger debate, that of immigration reform, in a presidential election year?

When I ran across these activists while conducting research with immigrant women over the past several years, they were not yet on the radar of national media or politics, but were already taking dramatic actions on behalf of their cause: marching, picketing, petitioning, video-documenting their stories. If the late sociologist Charles Tilly were still with us, he would most certainly recognize strategies that he had documented across effective social movements. For example, such movements use credible displays of worthiness, unity, numbers, and commitment. How much more worthy than the image of an activist in a graduation mortar board? Than petition signatures from hundreds of respected professors? Than endorsement by leaders of conservative religious denominations? Than echoes of our own American rhetoric: “dreaming”? And how much more commitment than hunger strikes and coming-out parties, at the risk of deportation? Across the past two years, these activists gradually became bolder, staging acts of civic disobedience and public events nationwide.

Immediately after the president’s announcement, their dream went global. As I was sitting in the . . .

Read more: Teaching Us To Be Americans Again: The DREAMers On Their Long March To Immigration Reform