This last example suggests why the J.F.K. cult matters — because its myths still shape how we interpret politics today. We confuse charisma with competence, rhetoric with results, celebrity with genuine achievement. We find convenient scapegoats for national tragedies, and let our personal icons escape the blame. And we imagine that the worst evils can be blamed exclusively on subterranean demons, rather than on the follies that often flow from fine words and high ideals.