care to cite some examples of deflation quickly destroying an economy? there are many such examples for inflation. Argentina, Germany, Zimbabwe, Greece
there is deflation that comes from shrinking of the monetary base
and there is deflation that arises out of productivity gains
often the "deflation" observed in bad economies is a symptom rather than the cause E.g. there were a few months of official deflation in the US following the global financial crisis, but this followed from the crash rather than caused it.
