Suppose that the US presidential election of 1932 had, in fact, taken place in 1930, at an early stage in the Great Depression.
Suppose, too, that Franklin Delano Roosevelt had won then, though not by the landslide of 1932. How different subsequent events might have been. The president might have watched helplessly as output and employment collapsed. The decades of Democratic dominance might not have happened.
On such chances the wheel of history turns.
Martin Wolf, FT, August 31 2010

I (among others) then argued that policy needed to be hugely aggressive. Alas, it was not. I noted on February 4 2009, at the beginning of the new presidency: “Instead of an overwhelming fiscal stimulus, what is emerging is too small, too wasteful and too ill-focused.”

The direction of policy was not wrong: policymakers – though not all economists – had learnt a great deal from the 1930s. Sensible people knew that aggressive monetary and fiscal expansion was needed, together with reconstruction of the financial sector.

But, as Larry Summers, Mr Obama’s chief economic adviser, had said: “When markets overshoot, policymakers must overshoot too”. Unfortunately, the administration failed to follow his excellent advice. This has allowed opponents to claim that policy has been ineffective when it has merely been inadequate.

More of this article at Financial Crisis

THE WORLD HITLER NEVER MADE:
Alternate History and the Memory of Nazism,
by Gavriel D. Rosenfeld, Cambridge University Press
Reviewd by Vernon Bogdanor,
Financial Times; May 28, 2005