As Short Circuit No.5 would say, "Input! I need input!"
I knew not all depressions were caused by speculation and resulting stock market crashes, but your reminding me of the huge destruction of WWI, loss of a generation of workers in the trenches, and the 20 million dead from the Swine flu (it did not originate in Spain) was useful.
I WILL get back to you; promise. And I'll tell you about earlier panics and depressions, of which there were MANY, in our nation's history.