Our customs, behaviors, and values are byproducts of our culture.

As long as you have war, police, prisons, crime, you are in the early stages of civilization.

You don't need to get rid of religion; you have to outgrow the need for it. In other words, instead of hoping for the good life, you make the good life.

If we are genuinely concerned about the environment and the fellow human beings, and want to end territorial disputes, war, crime, poverty, hunger, and the other problems that confront us today, the intelligent use of science and technology are the tools with which to achieve a new direction – one that will serve all people, and not just a select few.

You really don't want a job. What you want is access to those things you'd like to have.

As long as superstition and ignorance prevail, humanity will fall short of eradicating war, poverty, and hunger.

We don't know how to live together on Earth, how the hell are we going to live together on Mars?