http://en.wikipedia.org/wiki/Panic_of_1873
Like today, it was caused by people pretending absurd real estate
prices were real and that arcane financial instruments were safe.
It was also pre-regulation of almost anything, where the little guy
was just cattle and nobody gave damn how many people died.
Still, we could pull out of this if only the majority of people would
pull their heads out of their asses and stop believing that their
beliefs trump objective reality.