In terms of climate change? Alternet's David Morris thinks so, and in
this article suggest some ways that signatory countries to the Kyoto treaty could "punish" non-compliers like the US and Australia. I like his ideas of punishment, as they would demonstrate concretely that the global economy is moving in a sustainable direction. The US should be leading this movement, but it looks like we'll have to be dragged in kicking and screaming...