Ten years ago, we were hit by the biggest financial shock in world history, worse even than the Great Depression.
Indeed, during the 1930s, "only" a third of US banks failed, while in 2008, former Federal Reserve chairman Ben Bernanke has said, 12 of the country's 13 largest financial institutions were on the verge of going under before they got bailed out. A big part of the reason things were potentially so much more apocalyptic this time around was that we'd made it easier for bank runs to happen. It used to be that banks just borrowed money from depositors to then lend out themselves, which meant that any kind of panic required people to individually pull their money out. Now, though, a lot of banks borrowed money from markets instead, so they could all go out of business overnight if those broke down - which, of course, they did.
So if nothing had been done, almost every major bank would have collapsed, and otherwise solvent companies wouldn't have been able to borrow the money they needed to meet payrolls or manage the rest of their day-to-day operations. The Fed, then, would have had to go from being the lender of last resort to the lender of only resort - replacing these parts of the financial system itself - just so that we could have continued to have an economy. As it was, simply flirting with this possibility was enough to send the world into complete free fall.
As economists Barry Eichengreen and Kevin O'Rourke have shown, global stocks, trade, and output actually all fell faster in 2008 than they had in 1929. Maybe the best example, though, of how quickly things turned was that South Korea, a country that didn't have any exposure to subprime, but did have banks that depended on borrowing the money they needed from markets, went from growing at a 3.5 per cent pace right before Lehman to shrinking at a 12.7 per cent pace right after.
The beating heart of the economy - the financial system - had stopped all over the world.