The Death of the Vazir-Mukhtar/YMMV


 * Moral Event Horizon: Hardly any definite ones in the main story, but the flashback about Agha Mohammad Khan Qajar razing Tiflis and having his army kill most men and rape and cripple all the women they could get their hands off probably counts.
 * Arguably, Doctor McNeal  and Samson Khan   count as well (though in Samson's defense he was both really provoked before crossing the horizon and clearly remorseful afterwards).
 * Values Dissonance: Griboyedov and other characters have very authentic early 19th century opinions about women and savages (though Griboyedov is not so sure about the savages, having far fonder memories of Tbilisi than of Moscow or St. Petersburg).