Four global-scale forces are interacting to change the nature of the world as we know it: greenhouse gas concentrations, consumption, extinction, human population
Per-capita consumption is increasing in U.S.
Positive discount rate (i.e., interest rate) ensures that everything is valued less at a later date than it is valued today, in economic terms
Social classes: about 1 billion of the world's 6 billion people survive on less than $1/day
Human desires and marketing lead to a global-scale tragedy of the commons
Sixth great extinction on earth
Homogenization of species composition, cultures, languages as we lose the uncommon ones of each
Ecosystem services: clean air, clean water
Nearly four billion years of life driven by procreation
The role of denial
Developing a planetary ethic
Accounting for the links between environmental protection, social justice, and the human economy
Living "as if"
Ayres, E. 1999. God's Last Offer. Four Walls Eight Windows, New York.
Hamilton, A., Madison, J., and Jay, J. 1787-1788. The Federalist Papers. Many editions and publishers.
Hardin, G. 1993. Living Within Limits: Ecology, Economics, and Population Taboos. Oxford University Press, Oxford, England.
Henry, J. 1963. Culture Against Man. Random House, New York.
Human Rights Watch
Wilson, E.O. 1998. Consilience: The Unity of Knowledge. Knopf, New York.