The story of humanity in space is not over, but the reality is that Musk is probably already yesterday’s man. The apogee of his arc was most likely the chainsaw tableau onstage at CPAC — and what a pathetic apogee it was: a man in late middle age, haunted and horribly unhappy, drug-addled and gibbering, further in that moment from Mars than he had ever been. If he has a legacy in space, it is less likely to be the Martian accomplishment and more likely to be that he took Kennedy’s dream and made it tawdry, partisan, and stupid.