(5) Sedition: Although not without controversy, the U.S. Supreme Court has upheld statutes which prohibit the advocacy of unlawful conduct against the government or the violent overthrow of the government. As with prohibitions discussed earlier, the expressions in question are assessed according to the circumstances. Academic discussion of the theories of, say, Karl Marx presumably would not be prohibited under such a test, especially in this post-Soviet era. The theoretical consideration and even endorsement of these views could not remotely be considered to be reasonable expectations of the actual overthrow of the government. But it is possible that an artist might develop a project, perhaps guerrilla theater or an exhibit, that urged the destruction of the United States (the "Great Satan") by extremist religious groups. The likelihood of success by the latter group would seem as improbable as the likelihood of success by contemporary Marxists.