The Massachusetts Institute of Technology (MIT) has caved to the demands of progressive activists to cancel a guest lecture because of the speaker’s opinions on diversity hiring. Dorian Abbot, a geophysicist at the University of Chicago (UC), had been invited by MIT’s Department of Earth, Atmospheric and Planetary Sciences to give its prestigious Carlson Lecture on Oct. 21. He was to talk about the climate on exoplanets, or planets that orbit stars other than the sun of our solar system. On Oct. 2, however, Abbot wrote on Twitter that MIT has cancelled his lecture, a move he described as a “bad decision under pressure.” Abbot became the target of the progressives last year after he expressed doubts about certain aspects of the “Diversity, Equity, and Inclusion (DEI)” policies at the UC. In August, the UC campus left renewed its effort to “cancel” Abbot, after he co-authored an opinion piece in …