Originally posted by stevemcc
Since the end of WW1, there have been many who have 'refuted' Keynes. I'm not familiar with Hazlitt, so I can't comment.
The argument about disasters is a little simple-minded, it seems to me. WW2 was hardly celebrated, but I don't know anyone who thinks it was bad for the economy. The correlation between what we celebrate and what is good for the economy is a non-starter.
Millions of men die, and are no longer in the labor force, immediately curing unemployment. Bastiate's broken window fallacy argued that the glazer and window maker benefit by a careless child breaking a storekeeper's window.
However, what the laborers who repair the window gain, the shoemaker may lose because the shopkeeper has to repair the window instead of buying his wife a new pair of shoes, or make it any other consumer goods of combination of them. The simplicity of the argument is its strength.
WWII did not create new wealth, new prosperity. In fact it wreaked havoc on most of Europe. Decades would pass before cleanup and rebuilding was near complete. Peacetime does have its economic benefits, mainly that the spending on munitions and killing stopped. The death and destruction can't be shown to be an economic stimulus or good by any stretch of the imagination.
There is a short view in disasters like Katrina, where lots of unemployed contractors descend on the disaster area and earn a lot of money, and spend some in the local economy. But visiting the area will tell a different story, that of thousands of homes destroyed, which will never be rebuilt, losses which can't be counted, families that left the state, supported by welfare or charity, for long periods of time. Only a purely superficial view of such economic "benefits" of disasters is in harmony with Keynesian or Krugman economics.