But working for peace will yield a positive outcome, he said.

People will survive, he said.

If you could just stop shooting at them, they really do pretty well.

67th Annual Directors Guild Of America Awards - Arrivals

Credit: Jason LaVeris/FilmMagic

Murray went on to praise the young people at the forefront of the movement.

But there are idealists left over the age of 18, Im sure of it.

Idealism is a voice thats inside of you; its your conscience.

Sometimes its just a whisper, but, in some people, its a shout.

March for Our Livesdemonstrations are scheduled for Saturday in cities across the world.

Murray can be seen next inIsle of Dogs, which premieres Saturday.

Read his full op-ed over atNBC.