Does Clarence Thomas's Silence Matter? -- four opinions, via the NY Times:

The Lone Dissenter
Jamal Greene Jamal Greene, professor, Columbia Law School

A Matter of Personal Style
Orin Kerr Orin Kerr, George Washington Law School

Not Everyone Needs to Speak
Vikram Amar Vikram Amar, law professor, U.C. Davis

The Importance of Chiming In
Timothy R. Johnson Timothy R. Johnson, political scientist, University of Minnesota