How are warmonger penalties calculated? One game, I take one capital and everyone immediately denounced me. The next game, I take two capitals and no one bats an eye. What could the difference be?
AI warmonger part of algo modifiers(from AI side):
Increase penalty if we don't like the attacker
Decrease if we don't like the defender
1/5 penalty if I'm also at war with conquered civ
Reduced penalties for religious friends
Increased penalties for religious enemies
Are the conqueror and I of the same ideology? We overlook war on our ideological opponents
Are the conqueror and I of different ideologies? We shall not overlook this (especially if they're fighting an ideological ally)!
Is the conquered player embargoed (i.e. sanctioned)? If so, half warmonger penalties against this civ
Relations should matter. If we're friends, we should be a bit more understanding of war (unless, of course, you war on other friends of ours)
Proximity should matter.
Also there are some modifiers in start of algo(like vassals, met civ, cooperated war, etc)
Penalty for city calculates from cities population(base), economic strength(modifier),capital(modifier),was city reconquered(modifier),number of cities remained(after conquer),number of cities on the map(total for all).