Capitalism is a cancer in the biosphere.

We must make this an insecure and inhospitable place for capitalists and their projects. We must reclaim the roads and plowed land, halt dam constructions, tear down existing dams, free shackled rivers and return to wilderness millions of acres of previously settled land.

The AIDS epidemic, rather than being a scourge, is a welcome development in the inevitable reduction of human population... If it didn't exist, radical environmentalists would have to invent it.

I founded Friends of the Earth to make the Sierra Club look reasonable. Then I founded the Earth Island Institute to make Friends of the Earth seem reasonable.

Humanity is the cancer of nature.

I believe that human overpopulation is the fundamental problem on Earth Today" and, "We humans have become a disease, the Humanpox

There is no more honorable thing any of us can do with our lives than to work to put part of the world off-limits to the activities of human beings.