Our national debt is now so high that most of us have stopped thinking about it, because the prospect of bringing it under control is unimaginable. We consider it a national liability and fear our children will be forced to pay for our current excesses. John Steele Gordon is a welcome antidote. In 1997, his book, Hamilton's Blessing, offered a "biography" of the debt, making it very much a human drama while explaining the myriad, mostly positive,...