Yes, well, i didn't reject the concept of a tragedy of the commons entirely. Clean air is a goal we can attain. In North America, north of the Rio Grande, at least, there is abundant fresh water. We can't rely on petroleum, but solar energy, geothermal, wave and wind energy are, at least seemingly limitless. We have more than sufficient arable land to produce what we need to feed ourselves. In large measure, this "tragedy of the commons" respresents a view of resources which is narrow and specific. If you only look at petroleum as the energy resource, it applies. But if you are looking at energy sources and alternative forms of energy use, solar power makes the claim look ridiculous. If it were ever necessary to feed our population, farmers could be prohibited from growing grain to be converted to ethanol. That would be an interesting legislative attempt. Whether or not there are many resources which are limited i don't think is an issue. Whether or not most
resources are limited is a good subject for debate.