The critical size is much smaller than that
Much smaller civilizations have destroyed themselves. For instance Easter Island cut down all of their forests, even though they knew that they would inevitably starve after they did so.
You have instability in any group which is large enough that most people (through a tragedy of the commons) are willing to spend virtually no energy on public goods.
Cheers,
Ben
To deny the indirect purchaser, who in this case is the ultimate purchaser, the right to seek relief from unlawful conduct, would essentially remove the word consumer from the Consumer Protection Act
- [link|http://www.techworld.com/opsys/news/index.cfm?NewsID=1246&Page=1&pagePos=20|Nebraska Supreme Court]