And it was only when we invented the spear and began roaming the planet that technologies got complex and central to human survival.

That is certainly the point: when the human species was born, on the African savanna, life was pretty good; we could live in harmony with the rest of nature, and that's what I've been calling Eden. The only technologies that humans devised for some 2 million years were fire and the hand ax. That's all. Eden didn't need anything more

When I speak of knowledge of nature, I do not mean industrial science, which argues that nature is inert and can be understood only to enable humans to manipulate it. I mean that sense of nature that Aldo Leopold had in mind when he said, "A thing is right when it tends to preserve the integrity, stability, and beauty of the biotic community, wrong when it tends otherwise.

I'm convinced that the catastrophes of the next two decades will be so vast as to bring about a world where life, if it survives, will be far simpler - and the technologies, too. Then we will have come full circle to something like life on the savanna.

Governments, existing primarily to protect and enhance capitalism, maintain their power through the use of technologies that control the populace - by bread or circuses, by war or schooling, by armies and police, all of which are enabled and empowered by technology. That is what we might call the stick part of capitalism, while the riches-for-the-few is the carrot.

Economic and social misery increases in direct proportion to the size and power of the central government of a nation or state.

Everyone is shy - it is the inborn modesty that makes us able to live in harmony with other creatures and our fellows. Achievement comes not by denying shyness but, occasionally, by setting it aside and letting pride and perspiration come first.