One thing I did was grow up as an ardent naturalist. I never grew out of my bug period.

The naturalist is a civilized hunter. He goes alone into the field or woodland and closes his mind to everything but that time and place, so that life around him presses in on all the senses and small details grow in significance. He begins the scanning search for which cognition was engineered. His mind becomes unfocused, it focuses on everything, no longer directed toward any ordinary task or social pleasantry.

The global conservation organisations are doing everything they can on modest budgets. They essentially promote setting aside reserves and parks around the world.

The one process now going on that will take millions of years to correct is the loss of genetic and species diversity by the destruction of natural habitats. This is the folly our descendants are least likely to forgive us.

If you go from the USA - which, relative to the rest of the world, is in pretty good shape in terms of biodiversity and sustainability - to the tropics, everything gets worse. You have Indonesia, which is destroying its own forest. In West Africa there's no control whatsoever. It's a global situation. For that reason it ties in clearly with the needs and relationships of low-income countries.

We don't know nearly enough about the complexities of Nature. If we think we can eliminate natural ecosystems and substitute prosthetic devices, i.e. clean air or water with fusion energy - we are kidding ourselves.

So in my freshman year at the University of Alabama, learning the literature on evolution, what was known about it biologically, just gradually transformed me by taking me out of literalism and increasingly into a more secular, scientific view of the world.