In Madison's Cave

“We two ought not to die before we have explained ourselves to one another.”
John Adams wrote those words to Thomas Jefferson early in the long series of letters they exchanged near the end of their lives. In Madison’s Cave is Jefferson’s imaginary explanation, organized around four drawings that he hopes will map the route to a complete emancipation of human nature. The souls of men are demons, Jefferson begins, but he is convinced that he has built a verbal machine to exorcise them, a mech...