There is nothing more dangerous than a shallow thinking compassionate person

The rational man finds that his share of the cost of the wastes he discharges into the commons is less than the cost of purifying his wastes before releasing them.

But as population became denser, the natural chemical and biological recycling processes became overloaded, calling for a redefinition of property rights.

Why are ecologists and environmentalists so feared and hated? This is because in part what they have to say is new to the general public, and the new is always alarming.

Throughout history, human exploitation of the earth has produced this progression: colonize-destroy-move on.

A finite world can support only a finite population; therefore, population growth must eventually equal zero.

Thou shalt not transgress the carrying capacity