Where do we have room for people we would want to have a conversation with?

Here is the beginning of my list:

Hypatia, the scholar from Alexandria
John Wesley Powell, the Civil War soldier, explorer, classifier of Indian languages, conservationist.  He walked across Wisconsin when young.
Lieutenant Chamberlin, who defended his position at the Battle of Gettysburg, scholar, politician, and rhetoric professor.
Mark Twain
Malcolm X