Irving Fisher was dismissed during the Great Recession because he made the statement that stocks were at a permanent plateau right before the stock market crash, yet he was one of the most insightful economists on debt cycles.
It is good to review some of his comments on debt deflation which was summarized in his article, "The Debt-Deflation Theory of Great Depressions," Econometrica, 1(4), pp. 337-357
“Panics do not destroy capital; they merely reveal the extent to which it has been destroyed by its betrayal into hopelessly unproductive works.”
“Theoretically there may be — in fact, at most times there must be — over- or under-production, over- or under-consumption, over- or under-spending, over- or under-saving, over- or under-investment, and over or under everything else. It is as absurd to assume that, for any long period of time, the variables in the economic organization, or any part of them, will “stay put,” in perfect equilibrium, as to assume that the Atlantic Ocean can ever be without a wave.”
In summary, we find that: (1) economic changes include steady trends and unsteady occasional disturbances which act as starters for cyclical oscillations of innumerable kinds; (2) among the many occasional disturbances, are new opportunities to invest, especially because of new inventions; (3) these, with other causes, sometimes conspire to lead to a great volume of over-indebtedness; (4) this in turn, leads to attempts to liquidate; (5) these, in turn, lead (unless counteracted by reflation) to falling prices or a swelling dollar; (6) the dollar may swell faster than the number of dollars owed shrinks; (7) in that case, liquidation does not really liquidate but actually aggravates the debts, and the depression grows worse instead of better, as indicated by all nine factors; (8) the ways out are either laissez faire (bankruptcy) or scientific medication (reflation), and reflation might just as well have been applied in the first place."