Those who believe in a living Constitution claim that the document contains abstract and open-ended terms whose meaning legitimately evolves in ways that the founding generation could not have imagined. Sometimes they enlist one of the greatest thinkers of that very generation, Thomas Jefferson, to support their argument: Some men look at constitutions with sanctimonious reverence, and deem them like the arc of the covenant, too sacred to be touched. They ascribe to the men of the preceding age a wisdom more than human, and suppose what they did to be beyond amendment. I knew that age well; I
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