Today is the 100th birthday of my late father, John Barkley Rosser, Sr., who died on September 5, 1989. One can learn from his Wikipedia entry that he was a famous logician who proved a generalization of Godel's Incompleteness Theorem, invented "Rosser Sentences," helped prove the Church-Rosser Theorem in computability theory, to discover the Kleene-Rosser Paradox in same, as well as the Rosser Theorem in prime
number theory. He was also involved in the study of rocket ballistics, which led to him advising the US military during World War II, and continuing this later, eventually serving as Director of the US Army funded Mathematics Research Center (1963-73) at the University of Wisconsin-Madison, which was bombed on August 24, 1970 by the anti-Vietnam War "New Year's Gang," resulting in the death of Robert Fassnacht, an anti-Vietnam War physics grad student.
I was a student there in those days, and while I have always disapproved of violence in protesting wars, I came to have strong political disagreements with my father, which ended up being reported in local newspapers ("the irony"), as well as eventually in books (_Rads_, Tom Bates, 1989, Harper Collins). However, later we reconciled personally, while continuing strong political disagreements. I always respected his intelligence and integrity, and this encourages me that it is possible to maintain civil discourse in this world across deep political divides, as long as mutual personal respect can be maintained.