Seditious libel (n.) is the test of a free society: where you can be punished for criticizing the government, even in the background, the society is not free.
Seditious libel (n.) is the one charge where truth is no defense — truth makes it worse, since a true criticism undermines the state all the more.
Seditious libel (n.) is the old doctrine under which truth was no defense — it only made the crime of discrediting authority worse.
Seditious libel (n.) makes criticism of government a crime; it is the hallmark of closed societies, and America ruled it out only in 1964.
Seditious libel (n.) is the idea that speech can criminally assault the state — the hallmark of closed societies; a society that tolerates it is not free.