What an extraordinary time to be alive. We're the first people on our planet to have real choice: we can continue killing each other, wiping out other species, spoiling our nest. Yet on every continent a revolution in human dignity is emerging. It is re-knitting community and our ties to the earth. So we do have a choice. We can choose death; or we can choose life.

What gave her [Diane Wilson] the courage? If you look at someone like Diane, it's easy to say, well I could never be like that. But we don't know. We do know that it's possible for a woman, who didn't grow up as a world changer, to find it in herself to take a stand.

My children threw me a life line: "Return to your roots - food - and rewrite your first book, Diet for a Small Planet." I learned that if I could just show up, in this case, if I could just get myself out of bed, get to the computer in my tiny office at MIT, and start writing, help would start arriving.

Little wonder that it can seem unthinkable to say "no, thanks" to the modern-day equivalent of our tribe - our fear-driven culture.

A teacher told me this story some time ago: She asked her students to line up in order of how much power they thought they had relative to the others in the class, and they all fought to be last in line. They didn't want to acknowledge that they had personal power.

History doesn't proceed in incremental little notches.

I get goose-bumps when you talk about Diane Wilson. Who knows where she found that courage? When she was a child, she would crawl under the bed when a stranger came to the house. But in 1989, she found out that her county in south Texas was ranked worst in the country for toxic waste. She wondered if the effluent, dumped into the waters where she and her family had shrimped for generations, might be responsible for the dwindling fish populations. And she suspected that her son's autism might be related to the pollution.