Kunstler has been writing about peak oil for ages, and is something of an expert in this area, despite being "crazy" - I mean, he definitely sounds crazy, but then again, there's a reasonable chance he could be right about the pending apocalypse, it's not like we're below the carrying capacity of the planet (given our resource usage) or anything.
There is no pending apocalypse. We'll hit peak oil around mid-century, and it's not like all of the oil just runs out at that point. We're investing heavily in research into renewables, and I figure that the politics of nuclear will improve in the next couple of decades.