The Globe and Mail reports in its Thursday edition that Elon Musk has registered achievements in electric vehicles, space exploration and, possibly, neuroscience. The Globe's Lawrence Martin writes, however, that his $44-billion (U.S.) purchase of Twitter (X) has left many to wonder if he is a force for good. His wild mood swings have led to rash outbursts, a prime example being his public endorsement, for which he later apologized, of an antisemitic conspiracy theory that Jews harbour "hatred against whites." He proposed a peace plan that sounded Kremlin-hatched, advising Ukraine to surrender all occupied territories. He has taken harsh stands against immigration. A white South African, Mr. Musk was a Democrat who supported Barack Obama, but he began grandstanding against COVID-19 lockdowns, and by "wokeism" (respect for racial communities), which he detests. Donald Trump has been courting Mr. Musk recently and has invited him to speak at the Republican convention in July. That is worrisome. A free-speech absolutist, Mr. Musk allows all kinds of conspiracy theories to flourish on X. Don Lemon thought he had a partnership with X for his new show, but had it abruptly cancelled following an interview he did with Mr. Musk.