In an approximate way, the logic of commons has been understood for a long time, perhaps since the discovery of agriculture or the invention of private property in real estate.

A coldly rationalist individualist can deny that he has any obligation to make sacrifices for the future.

In a finite world this means that the per capita share of the world's goods must steadily decrease.

Using the commons as a cesspool does not harm the general public under frontier conditions, because there is no public, the same behavior in a metropolis is unbearable.

No one should be able to enter a wilderness by mechanical means.

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.