So this new modifier appears to work as follows, will test further Once you are over 50% on the victory screen and no-one is higher than you you will accumulate -1 with each civ that has met you. New civs takev 1 turn to assess this. If someone surpasses you your accumulated points start decreasing 1 per turn This modifier appears to have a max value of -500 This modifier applies to whichever civ is winning, not just you. In this example on turn 121 I took my fourth capital meaning I was over 50%. As diplomacy works at the end of a turn the modifier applies the next turn.