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Throughout my life, politics and political science have been intertwined. I handed out leaflets for Adlai Stevenson at age 12, participated in protests at Oberlin and Berkeley, and, as I developed professional expertise, worked with national security agencies. Conflict has been a continuing interest, particularly whether situations are best analyzed as a security dilemma or aggression. In exploring this question, I was drawn into both political psychology and signaling, although the two are very different. I have continued to work on each and occasionally try to bring them together. My thinking about strategic interaction led to a book-length exploration of system effects, a way of thinking that I believe is still insufficiently appreciated in the discipline and among policy makers. My research continues to be stimulated by both developments in the discipline and unfolding international politics.

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