Australia is the most isolated continent.

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?

The secret of life is love, but the purpose of life is happiness.

All I really need to know... I learned in kindergarten.

It's amazing that this is still news to people, but that affects the final outcome of the film. When people are treated well, and they're made to feel valued, they give 110 percent.

Oh, what a dear ravishing thing is the beginning of an Amour!

I don't use old music.

Blessed be childhood, which brings down something of heaven into the midst of our rough earthliness.

But men labor under a mistake. The better part of the man is soon plowed into the soil for compost.

I love being able to have a team.

Whatever is presented to him must be made beautiful and clear, striking his imagination. Once this love has been kindled, all problems confronting the educationist will disappear.

You don't have to become a slave in a corporate office or groupie of a celebrity architect, because all you need is a piece of paper, a pencil and the desire to make architecture.