But this was how the mind worked. The mind couldn’t think about the End of the World all the time. It needed the occasional break, a romp through the trivial. Because it was through trivia that the mind was anchored in reality, as the largest oak tree was rooted, ultimately, in a system of rootlets no larger than the silver hairs on the president’s head.

But I have to warn you that this is the word—‘politics’—that nerds use whenever they feel impatient about the human realities of an organization.”

He had had many conversations during his long life. Some were fascinating and stayed with him more than a century later. Others were less so. As a younger man he had tolerated those as part of the cost of doing business—a sort of tax that all people must pay in order to take part in civilized society. When he had turned one hundred, he had decided to stop paying that tax. Henceforth he would engage only