"Many quite popular films are filled with violence. I think the difference between those and my films is that I show the cause and effect of violent activity. It's not a Donald Duck situation where he get a brick in the back of the head and gets up and walks away in the next frame. Mine have violence which keeps Donald Duck in the hospital for six months and creates a trauma which he will remember for the rest of his life."

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Adding more people causes problems. But people are also the means to solve these problems. The main fuel to speed the world’s progress is our stock of knowledge; the brakes are our lack of imagination and unsound social regulations of these activities. The ultimate resource is people—especially skilled, spirited, and hopeful young people endowed with liberty—who will exert their wills and imaginations for their own benefits, and so inevitably they will benefit the rest of us as well.

— Julian Simon