“Mike” (the name he has on his website) Bloomberg’s commencement speech at Harvard is quite a work of art. It criticizes liberal dogmatism on elite campuses and conservative dogmatism in our legislatures. In both dogmatic cases, the cause is fearful intolerance of diversity. In both cases, the cause is a lack of confidence in the truth of one’s own opinion. Bloomberg reminded the audience of what John Stuart Mill wrote on On Liberty, of “the clearer perception and livelier perception of truth” that’s “produced by its collision with error.”

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