I've always been interested in a lot of things, and a lot of things at the same time, and I always tried to explain them to myself. I ask a lot of questions.

History as well as life itself is complicated -- neither life nor history is an enterprise for those who seek simplicity and consistency.

Forced to choose between limiting population or trying to increase food production, we chose the latter and ended up with starvation, warfare, and tyranny.

The adoption of agriculture, supposedly our most decisive step toward a better life, was in many ways a catastrophe from which we have never recovered.

AIDS and malaria and TB are national security issues. A worldwide program to get a start on dealing with these issues would cost about $25 billion... It's, what, a few months in Iraq.

We're uncomfortable about considering history as a science. It's classified as a social science, which is considered not quite scientific.

Biology is the science. Evolution is the concept that makes biology unique.

Technology has to be invented or adopted.

Rhino-mounted Bantu shock troops could have overthrown the Roman Empire. It never happened.

Human societies vary in lots of independent factors affecting their openness to innovation.

Why did human development proceed at such different rates on different continents for the last 13,000 years?

Just as trees need roots in the earth, man is also a tree and needs roots in existence or else he will live a very unintelligent life.

Every single man who is too stupid enough to realize how beautiful is God's creation through WOMEN and continuously lay his hand on them, he is not man enough to be classified with the rest of us.

When I got my tour card I cried. When I got my first win - and my first pay check - I cried. All these things make me cry.

Patience! patience! You are always in a hurry, but God is not.

Death renders all equal.

She paused. That's just my way of saying I would've killed you if you'd died.

It's a privilege to pay taxes. Yeah! It's not a political question, folks. We have to pay for stuff.

I cannot see how a man of any large degree of humorous perception can ever be religious -- unless he purposely shut the eyes of his mind & keep them shut by force.

There's always pressure, a great deal of pressure, when writing, since my first books were so successful.

How can kindliness rule that man Who eateth other flesh to increase his own?