You Cannot Do Only One Thing.

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.

The Morality Of An Act Is A Function Of The State Of The System At The Time It Is Performed.

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.

In A Competitive World Of Limited Resources, Total Freedom Of Individual Action Is Intolerable