It's obvious that the key problem facing humanity in the coming century is how to bring a better quality of life - for 8 billion or more people - without wrecking the environment entirely in the attempt.

People who have physical activity do tend to have longer life. And they report higher quality of life.

It's obvious that the key problem facing humanity in the coming century is how to bring a better quality of life -- for 8 billion or more people -- without wrecking the environment entirely in the attempt.

The quality of life is more important than life itself.

In the 21st century, I think the heroes will be the people who will improve the quality of life, fight poverty and introduce more sustainability.

What have we lost? Well, we've lost a scientist who is really concerned about the quality of life for people who live in earthquake country. We have terabytes of information Tony gathered in the '80's and '90's (about earthquakes and land movement). That will be just part of Tony's legacy.