Even though I knew pretty early that I was going to be a scientist, it wasn't the science that interested me in science fiction; it was the vision of future societies that, for better or worse, would be radically different from our own.

One thing that is clearly not maximized by free markets is equality. I am talking not about that pale substitute for equality known as equality of opportunity but about equality itself.

The most influential utopian idea of the nineteenth and twentieth centuries was socialism, which has failed everywhere. Under the banner of socialism, Stalin's U.S.S.R. and Mao's China gave us not utopias but ghastly anti-utopias.

Steven Weinberg Quotes