"In the immediate postwar era, financial crises in advanced countries were rare events, and before 1970 did not happen at all. Since then they have occurred more often, and 2008 was the most damaging of them all to date. If we have moved back to a regime of regular financial crises - like the one we had from the 1870s to the 1930s - then our economic future will be very different from our recent past."