hostis humani generis , n :
(international law) A person who has committed a criminal act so grave – originally maritime piracy and slave-trading, and now torture as well – that any nation may put on trial and, upon conviction, punish him or her.
Source http://handbookblogger.blogspot.com/2017/07/hostis-humani-generis-word-of-day-for.html
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