Charles Krauthammer: How much are we willing to trade away for Newtown?

Except for these unfathomable mass murders. But these are infinitely more difficult to prevent. While law deters the rational, it has far less effect on the psychotic. The best we can do is to try to detain them, disarm them and discourage "entertainment" that can intensify already murderous impulses.

But there's a cost. Gun control impinges upon the Second Amendment; involuntary commitment impinges upon the liberty clause of the Fifth Amendment; curbing "entertainment" violence impinges upon First Amendment free speech.

That's a lot of impingement, a lot of amendments. But there's no free lunch. Increasing public safety almost always means restricting liberties.

We made that trade after 9/11. We make it every time the TSA invades your body at an airport. How much are we prepared to trade away after Newtown?

Charles Krauthammer's email address is letters@charles krauthammer.com.