It was caused under Hoover.
You don't understand what causes a crash.
The seeds of the crash was set up under Wilson. The 'good times' leading up to the '29 (the roaring 20's) was based on speculation caused by Wilson's policies. It finally collapsed in 1929, when Hoover was President. Wilson signed the Federal Reserve into law. This special bank was given the power to print money, as much as the federal government wanted, in exchange for the power to become the fiat designated currency (violating the Constitution of the United States by doing so). The result was that people put their gold into speculations, since the value was being liquidated into Federal Reserve notes. These speculations at first proved quite profitable, but they were essentially a pyramid speculation that finally collapsed in '29. WW1 had put tremendous pressure on the federal government, and it couldn't afford to pay it's costs. It was during this time that nation after nation begin moving to fiat currency and distancing themselves from gold, since they couldn't pay their debts. I am referring to governments, not the people.
Hoover, caught in the middle of the crash, was voted out of office and FDR came in, which completed Wilson's programs. The result was staggering. The Great Depression has set in. The disaster of the Treaty of Versailles finally resulted in WW2 breaking out. Hoover, who actually helped to build this treaty, was naive. Germany couldn't pay it's war debts either, and neither could Britain of France. Germany in particular was placed under tremendous debt (that's what the Treaty of Versailles did). The extreme conditions in Germany is what brought Hitler to power.
Hitler commissioned a car that was cheap enough for the everyday man to drive. It was literally built out of spare parts of the time, a bit of foundry work, and of course sheet steel that Germany was already good at. This car was known as the People's Car. In German, Volkswagon.
Unfortunately, Hitler had other designs, to spread fascism abroad. The Volkswagon itself was more expensive than people could afford at the time (it became wildly popular later, however). Much of the economy was instead directed to the German war machine. An economy of destruction. An economy that exists by destroying economies. In other words, theft. Wholesale. Invade other nations, take all their wealth, and use it to run the German War Machine. Hitler saw the power of the armored division. The Panzers were a very effective mobile armor. The French had nothing like it, and neither did Britain or the Russians. The Panzers were few and far between, however. They were select units in the German army.
A strong airforce was also built. Germany managed to develop jet power before anybody else because of it. It turned out to consume too much fuel to be practical in warfare at the time. Those jets were started with a small reciprocating motor (like an outboard motor on a boat) that you pull started. This engine sat behind the rear bulkhead. You used a pull rope to start your jets in those days. Some of those old starters still survive to this day in museums. That little motor produced the compressor speed enough to start the jet engine.
Are these a better economy? No. Everything about it was geared to destroy. It was not what people wanted to buy. It was massive government expenditure. It was fascism.
Hoover did not cause the crash or the Great Depression. Democrats did. Hoover was simply caught in the middle of it and everyone blamed him because the actual crash happened under his watch. People don't understand what causes crashes like this. They only see the crash itself.
During the Clinton administration, laws were passed to force banks to make loans to people that could not afford them, called the 'Fair Housing Act'. Speculation booms followed, first the stock market (which crashed in 2001), and again in housing itself, which crashed in 2007. it is not uncommon for the seeds of a crash to be established 10 to 15 years before the crash itself happens. The boom looks good, but it is based on an empty wealth. It is speculation. It is gambling.
Like before, when the crash happened, it could have simply been ignored and it would've corrected itself in a year or two as the debt unwound. Instead, Obama interfered with the recovery and caused a depression that lasted his entire term in office. The 'improved economy' published were fake numbers, just like the days of FDR. The parallel is astounding. Bush didn't help. Like Hoover, he was caught in the middle of it, because he didn't see what was happening. Bush is also a RINO. He is a Democrat running under a false flag. His unconstitutional 'Patriot Act' is one example of this.
Congress and the courts went along with ignoring the Constitution on this, just like they did with FDR.
Today, Democrats have openly discarded the Constitution. They do not recognize it. Neither do they recognize the constitution of any State. They are currently converting the federal government into an oligarchy so they can implement fascism. The ugly head of fascism rises again, along with all of the censorship, secret police spying on its own citizens, dictat after dictat, convictions without trial, seizure of property without trial or writ of authorization from any court, thugs threatening people and beating them up or sometimes even killing them, religions and free speech being suppressed, and the rest.
Will the American people put with it? Will the States? Talk of secession is already seriously being considered. Not just Texas. Many States. I don't think the SOA will let them secede quietly.
I really don't see how a civil war can be avoided now. What a waste.