A great deal of what many Americans hold dear is nowhere written on those four pages of parchment, or in any of the amendments. What has made the Constitution durable is the same as what makes it demanding: the fact that so much was left out.

In kindergarten, you can learn how to be a citizen of the world.

Republicans were more pro-choice than Democrats up until the late 1980s.

Germ theory, which secularized infectious disease, had a side effect: it sacralized epidemiology.

Disrupt, and you will be saved.

History is a long and endlessly interesting argument, where evidence is everything and storytelling is everything else.

The world may not be getting better and better, but our devices are getting newer and newer.