An ounce of practice is generally worth more than a ton of theory.

Any intelligent fool can make things bigger and more complex... It takes a touch of genius and a lot of courage to move in the opposite direction.

Any intelligent fool can make things bigger, more complex, and more violent. It takes a touch of genius — and a lot of courage to move in the opposite direction.

An attitude to life which seeks fulfilment in the
single-minded pursuit of wealth - in short, materialism - does not fit into this
world, because it contains within itself no limiting principle, while the
environment in which it is placed is strictly limited.

The generosity of the Earth allows us to feed all mankind; we know enough about ecology to keep the Earth a healthy place; there is enough room on the Earth, and there are enough materials, so that everybody can have adequate shelter; we are quite competent enough to produce sufficient supplies of necessities so that no one need live in misery.

In theory this is useful but in practice I would not expect more than changes at the margin.