I've seen how a spirit of unity, born of tragedy, can gradually dissipate, overtaken by the return to business as usual, by inertia and old habits an… - Barack Obama

It is entirely possible that these two attackers were radicalized to commit this act of terror. And if so, it would underscore a threat we’ve been focused on for years — the danger of people succumbing to violent extremist ideologies. We know that ISIL and other terrorist groups are actively encouraging people — around the world and in our country — to commit terrible acts of violence, often times as lone wolf actors. And even as we work to prevent attacks, all of us — government, law enforcement, communities, faith leaders — need to work together to prevent people from falling victim to these hateful ideologies. More broadly, this tragedy reminds us of our obligation to do everything in our power, together, to keep our communities safe. We know that the killers in San Bernardino used military-style assault weapons — weapons of war — to kill as many people as they could. It’s another tragic reminder that here in America it’s way too easy for dangerous people to get their hands on a gun. For example, right now, people on the No-Fly list can walk into a store and buy a gun. That is insane. If you’re too dangerous to board a plane, you’re too dangerous, by definition, to buy a gun. And so I’m calling on Congress to close this loophole, now. We may not be able to prevent every tragedy, but — at a bare minimum — we shouldn’t be making it so easy for potential terrorists or criminals to get their hands on a gun that they could use against Americans.

When we don’t pay close attention to the decisions made by our leaders, when we fail to educate ourselves about the major issues of the day, when we choose not to make our voices and opinions heard, that’s when democracy breaks down. That’s when power is abused. That’s when the most extreme voices in our society fill the void that we leave. That’s when powerful interests and their lobbyists are most able to buy access and influence in the corridors of power –- because none of us are there to speak up and stop them.

Participation in public life doesn’t mean that you all have to run for public office -– though we could certainly use some fresh faces in Washington. (Laughter and applause.) But it does mean that you should pay attention and contribute in any way that you can. Stay informed. Write letters, or make phone calls on behalf of an issue you care about. If electoral politics isn’t your thing, continue the tradition so many of you started here at Michigan and find a way to serve your community and your country –- an act that will help you stay connected to your fellow citizens and improve the lives of those around you.

That’s precisely what the founders left us: the power to adapt to changing times. They left us the keys to a system of self-government – the tool to do big and important things together that we could not possibly do alone. To stretch railroads and electricity and a highway system across a sprawling continent. To educate our people with a system of public schools and land grant colleges, including Ohio State. To care for the sick and the vulnerable, and provide a basic level of protection from falling into abject poverty in the wealthiest nation on Earth. To conquer fascism and disease; to visit the Moon and Mars; to gradually secure our God-given rights for all our citizens, regardless of who they are, what they look like, or who they love. We, the people, chose to do these things together. Because we know this country cannot accomplish great things if we pursue nothing greater than our own individual ambition. Still, you’ll hear voices that incessantly warn of government as nothing more than some separate, sinister entity that’s the root of all our problems, even as they do their best to gum up the works; or that tyranny always lurks just around the corner. You should reject these voices. Because what they suggest is that our brave, creative, unique experiment in self-rule is just a sham with which we can’t be trusted. We have never been a people who place all our faith in government to solve our problems, nor do we want it to. But we don’t think the government is the source of all our problems, either. Because we understand that this democracy is ours. As citizens, we understand that America is not about what can be done for us. It’s about what can be done by us, together, through the hard and frustrating but absolutely necessary work of self-government. The founders trusted us with this awesome authority. We should trust ourselves with it, too. Because when we don’t, when we turn away and get discouraged and abdicate that authority, we grant our silent consent to someone who’ll gladly claim it.