Krugman: Peak Oil has Arrived

His exact words are:

In particular, today, as in 2007-2008, the primary driving force behind rising commodity prices isn’t demand from the United States. It’s demand from China and other emerging economies. As more and more people in formerly poor nations are entering the global middle class, they’re beginning to drive cars and eat meat, placing growing pressure on world oil and food supplies.

And those supplies aren’t keeping pace. Conventional oil production has been flat for four years; in that sense, at least, peak oil has arrived. True, alternative sources, like oil from Canada’s tar sands, have continued to grow. But these alternative sources come at relatively high cost, both monetary and environmental.

Also, over the past year, extreme weather — especially severe heat and drought in some important agricultural regions — played an important role in driving up food prices. And, yes, there’s every reason to believe that climate change is making such weather episodes more common.

So what are the implications of the recent rise in commodity prices? It is, as I said, a sign that we’re living in a finite world, one in which resource constraints are becoming increasingly binding. This won’t bring an end to economic growth, let alone a descent into Mad Max-style collapse. It will require that we gradually change the way we live, adapting our economy and our lifestyles to the reality of more expensive resources.

Emphasis mine.  I would have worded it a bit differently: with a nuance here and a caveat there, but I think the broad thrust of what he's saying is helpful. It's good to see such a widely followed voice acknowledging these issues. I think the degree of political strain is going to be somewhat greater than he's yet acknowledging though.