JM
I'm unsure I understood your comment about gold in the 30's. I think Friedman (I talk about him a lot, don't I) in "Free to Choose" describes the events that lead to the severity of the downturn. Economic downturn occurred before the 30's. Generally, previous downturns lasted only 2-3 years. The 30's saw government interference in the flow of gold which made the depression last much longer and be much more severe.
Stability in the currency supply requires the amount of currency IN CIRCULATION to balance the assets in the country. If an economy is growing, the currency must grow or the economy stops such as in the 30's. Putting currency (or gold) in the mattress takes money out of circulation.
"Now, rather than people thinking of money as some material property which can be harmlessly stored, if they really understood it to be a contract, a bookkeeping entry, where one's asset is another's debt, there would be a much greater appreciation for how the larger economy is fundamentally tied together and harming one part unnecessarily creates negative blowback for the entire system, etc."
I think your talking about something other than money. Money has always been about trading assets. A farmer with lots of chickens trades chickens for pigs with a farmer with lots of pigs. No debt here. But modern times have produced a situation where money is exchanged for debt. As I noted, this has the effect of fooling the system into acting as if there is more money in the system than there really is. Like debasing the currency, inflation, bad stuff. Hence, when the homeowner cannot pay the mortgage, the system collapses. The interest rate controls this flow in a free market., a great negative feedback system. The problem the government kept the interest rate artificially low. I would think the problem you are addressing is really too much debt.
Are you thinking the system is a zero sum game (one wins at the expense of another)? That the economy grows and humanity advances shows a positive sum game. Actually it may be more like prisoners dilemma.
Well, such is my understanding. But I don't study this enough and could be way off base.