On the latter point: traditionally, the U.S. government ran significant budget deficits only in times of war or economic emergency. Federal debt as a percentage of G.D.P. fell steadily from the end of World War II until 1980. But indebtedness began rising under Reagan; it fell again in the Clinton years, but resumed its rise under the Bush administration, leaving us ill prepared for the emergency now upon us.

The increase in public debt was, however, dwarfed by the rise in private debt, made possible by financial deregulation. The change in America’s financial rules was Reagan’s biggest legacy. And it’s the gift that keeps on taking…

We weren’t always a nation of big debts and low savings: in the 1970s Americans saved almost 10 percent of their income, slightly more than in the 1960s. It was only after the Reagan deregulation that thrift gradually disappeared from the American way of life, culminating in the near-zero savings rate that prevailed on the eve of the great crisis. Household debt was only 60 percent of income when Reagan took office, about the same as it was during the Kennedy administration. By 2007 it was up to 119 percent.