Read this lucid big picture piece by Robert Samuelson about the global economy:

Despite some disagreements, economic scholars subscribe to a broad consensus about what went wrong in the 1930s. Government central banks, like the Fed, were too passive. They didn’t halt bank panics. Intervention at decisive moments (perhaps the failure of the Bank of the United States in late 1930 or Austria’s Credit Anstalt in spring 1931) could have changed history. Instead, mounting unemployment and falling prices fed on each other. Debtors couldn’t repay loans, leading to more bank failures, a contraction of credit and deposit losses.

But this time the mistakes were not repeated. Despite criticism, banks were "bailed out." Money was pumped into credit markets to pre-empt a downward spiral.

By this reading, the world has bought itself time to deal with underlying problems. As the economic recovery strengthens and lengthens, the politics of confronting unstable export-led growth (for Asia) or unsustainable welfare spending (for developed countries) will grow easier.

People will be more optimistic about the future; they will be more open to necessary, if not popular, adjustments. This could happen. The world may muddle through, making gradual and messy changes that ultimately defuse another large crisis.

But there is another more sobering reading of the Great Depression. It is that painful and once unthinkable changes are made only under the pressure of acute crisis…

Not much else to be said?