that involves personal politics overshadowing work. the head of the department is stepping down from that position because the university refused his choice of guest speaker on climate science because of the speaker s political views. romps explained his resignation, saying quote, it became unclear to me whether we could invite that scientist ever again, let alone now. excluding people because of their political and social diminishes the pool of scientists with which members of the basc, and more broadly such exclusion signals that some opinions are forbidden. the guest, geo fizzist university chicago professor dorian abbott had previously been disinvited from speaking at m.i.t., following complaints. last year, abbott posted several