Sad, but yeah...

Iirc it is the Milgram experiments that leave me hesitant to fully accept your literal hypothesis (with games and movies,) however there is a general truth (I feel) to the idea that trade is the opposite to war. Simply, as with trade, both parties/sides/nations get what benefits them without need for aggression, aka peace.

I don't know who said it, (there is debate) but;

“When goods don’t cross borders, soldiers will.”