2) Our so called "health care" system is extremely fubarred.
There's probably more, but those strike me as the big two.
Edit: To elaborate a bit on point 1, Peak Oil is not the end of oil. It is the end of cheap oil. The current U.S. economy and (expected) lifestyle was developed in the era of cheap oil. That era is ending, which is likely part of what is fueling the depression. Our current infrastructure, habits, etc are simply not sustainable with the cost of oil going up and not coming back down. (At this point, if we discovered that Antarctica or the moon were essentially 99% oil with a thin top layer of dust/snow/whatever, that would not solve this because endless expensive oil does not solve the problem here.)