I had a severe stroke following brain surgery to treat a giant fusiform brain aneurysm in 1996. I am able to walk with a walker, but more often use a wheelchair. The stroke also affected my speech.

In addition to the physical disabilities, I have been diagnosed with Pseudobulbar Affect (PBA), a neurologic disorder which is associated with becoming emotional easily and with exaggerated emotional responses. As I like to tell my students, I do not tell jokes in class because I start laughing before I get to the punchline. I also cry and get frustrated unusually easily.

Andover Newton Theological Seminary

I am a trustee of the Andover-Newton Theological Seminary, which is the oldest graduate school seminary in the country. Andover-Newton has merged with the Yale Divinity School and has sold its historic campus in Newton. The school is now known as the Andover-Newton Seminary at Yale.


I am married to Kathryn Spier, the Domenico de Sole Professor of Law at Harvard Law School. We have one son, James (or Jamie), who graduated from Harvard University. He currently works at Laboratory for Innovation Science at Harvard University.