Cameron Kasky, Jaclyn Corin, David Hogg, Emma González and Alex Wind

America’s response to mass shootings has long followed a predictable pattern. We mourn. Offer thoughts and prayers. Speculate about the motives. And then—even as no developed country endures a homicide rate like ours, a difference explained largely by pervasive accessibility to guns; even as the majority of gun owners support commonsense reforms—the political debate spirals into acrimony and paralysis.

This time, something different is happening. This time, our children are calling us to account.

The Parkland, Fla., students don’t have the kind of lobbyists or big budgets for attack ads that their opponents do. Most of them can’t even vote yet.

But they have the power so often inherent in youth: to see the world anew; to reject the old constraints, outdated conventions and cowardice too often dressed up as wisdom.

The power to insist that America can be better.

Seared by memories of seeing their friends murdered at a place they believed to be safe, these young leaders don’t intimidate easily. They see the NRA and its allies—whether mealymouthed politicians or mendacious commentators peddling conspiracy theories—as mere shills for those who make money selling weapons of war to whoever can pay. They’re as comfortable speaking truth to power as they are dismissive of platitudes and punditry. And they live to mobilize their peers.

Already, they’ve had some success persuading statehouses and some of the biggest gun retailers to change. Now it gets harder. A Republican Congress remains unmoved. NRA scare tactics still sway much of the country. Progress will be slow and frustrating.

But by bearing witness to carnage, by asking tough questions and demanding real answers, the Parkland students are shaking us out of our complacency. The NRA’s favored candidates are starting to fear they might lose. Law-abiding gun owners are starting to speak out. As these young leaders make common cause with African Americans and Latinos—the disproportionate victims of gun violence—and reach voting age, the possibilities of meaningful change will steadily grow.

Our history is defined by the youthful push to make America more just, more compassionate, more equal under the law. This generation—of Parkland, of Dreamers, of Black Lives Matter—embraces that duty. If they make their elders uncomfortable, that’s how it should be. Our kids now show us what we’ve told them America is all about, even if we haven’t always believed it ourselves: that our future isn’t written for us, but by us.

Obama was the 44th President of the United States