To dismiss the current extinction wave on the grounds that extinctions are normal events is like ignoring a genocidal massacre on the grounds that every human is bound to die at some time anyway.

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?

I sail on the ocean of possibilities with the wind of hope and the current of desires moving me to the shore of uncertainty.

Always go to the bathroom when you have a chance.

Delete, delete, delete and at the end find the ‘core aspect of the design’

God keeps giving Himself as long as we bring that into which He can pour Himself. And when we stop bringing, He stops giving.

Any one prominent in affairs can always see when a man may steal a horse and when a man may not look over a hedge.

In New York you've got to have all the luck.

To be happy, a man must love his wife as she chooses to be loved.

Running has been great for keeping me fit throughout my acting career.

We ought to be bragging about Florida!

Let go into the mystery Let yourself go You've got to open up your heart That's all I know Trust what I say and do what you're told Baby, and all your dirt will turn Into gold.