You're substantially oversimplifying if you think the repeal of Glass-Stegall was the cause of the financial crisis.
Then it's a good thing I didn't do that.
AIG, Fannie Mac, Freddie Mae, Bear Stearns, Lehman Brothers, Merrill Lynch, and dozens of other players weren't commercial banks, so the repeal of the law was irrelevant to them-
What got them in trouble was when the SEC loosened their restrictions on leveraging in 2004. This allowed these investment banks to make massive investments on Wall St without the cash to back up these investments. The problem was they invested in credit default swaps which were deregulated in an attachment to the Commodities Futures trading act of 2000 thanks to former senator Phill Gramm. Since no one was regulating these swaps people sold unsafe investments as safe investments. When people realized they were unsafe, everyone panicked to sell them off and the economy crashed. That's what happened to those companies.
For the record, I blame everyone. The financial crisis was the result of national greed: greedy bankers, greedy politicians, greedy Americans making bad decisions. Everyone was guilty.
All that points to one thing. A lack of regulations.
A moderate recognizes that there is no universal political or economic philosophy that humans can agree to follow. The extremes, such as Marxism and libertarianism, reflect the preferences of relatively small groups, and that's why they are objectionable and impractical.
Sure, in theory that sounds great. In reality the only moderate solutions to problems I hear involve splitting the difference between what conservatives and liberals suggest. That's not critical thinking nor is it always the best solution. If moderates had original ideas then maybe they'd be taken more seriously.
You're giving FDR the credit when you should be giving it to World War II.
If war was an automatic win button for economic success, we'd be in a golden age right now. WW2 didn't just accidentally happen. He pushed for it against conservative opposition, then he managed it in a way that brought a generation of economic prosperity. It's you who's not giving him enough credit.
Likewise, the prosperity the United States experienced in the postwar period had a lot more to do with the destruction of most of the world's industrial capacity than it did with policy prescriptions: if all the competition has been destroyed there is no choice except to buy your goods.
Which doesn't explain why the American economy was still strong in 1965. It's not as if German ceased to exist permanently.
WW2 wasn't something that just happened all of a sudden and the Japanese started dropping bags of money on us. FDR managed that war. He also instituted financial protections that led to America going ~50 without another depression. You can't pretend he had nothing to do with that.