From the dapper, unctuous ladies’ man of his youth, an opportunist steeped in the political intrigues of both Church and court, he became a perfectly ordinary citizen of New York, which in 1805 must have looked like the end of the world to him. From all that to this: a hard-working professor, a dutiful husband, the father of four. When one of his children died, it is said, he was so distraught with grief that he refused to leave his house for almost a year. The point being that, in the end, each life is irreducible to anything other than itself. Which is as much as to say: lives make no sense.

