The 21st amendment "overrides" the 18th amendment not because it comes later, but because it specifically repeals the 18th amendment: "The eighteenth article o

The 21st amendment "overrides" the 18th amendment not because it comes later, but because it specifically repeals the 18th amendment: "The eighteenth article of amendment to the Constitution of the United States is hereby repealed." If there is any precedent for the statement that "a later amendment supersedes earlier text of the constitution" this is not an example. A better argument, unfortunately rejected by SCOTUS, is that unlimited extensions to copyrights as currently allowed are not permitted by the copyright clause, which authorizes exclusive rights to authors for "limited Times." Unlimited extensions should not be allowed any more than should one million years be allowed as copyright term.