I think it's pointless asking questions like "Will humanity survive?" It's purely up to people - if they want to, they can, if they don't want to, they won't.

Instead of physicists teaching physics, physicists should go home and see what physics applies to their home.

The greatest change we need to make is from consumption to production, even if on a small scale, in our own gardens. If only 10% of us do this, there is enough for everyone. Hence the futility of revolutionaries who have no gardens, who depend on the very system they attack, and who produce words and bullets, not food and shelter.

We are sufficient to do everything possible to heal this Earth.

Most biologists, (says Vogel, 1981) seem to have heard of the boundary layer, but they have a fuzzy notion that it is a discrete region, rather than the discrete notion that it is a fuzzy region.

The worst thing about permaculture is that it's extremely successful, but it has no center, and no hierarchy.

One of the great rules of design is do something basic right. Then everything gets much more right of itself. But if you do something basic wrong - if you make what I call a Type 1 Error - you can get nothing else right.