I wish that was the case. I have a Gorgo(Greece game), and I wiped out my first continent of Germany and Harold well before the Industrial Era (like Medieval Era) . Then after I made contact with the other civs, sometime in the Industrial Era before I could declare war on the remaining 5 civs, Ghandi denounces me as a warmonger. I was surprised. Is it possible he made contact with Harold before I wiped him out? I have no idea. Only he did it, which makes me think that is possible. Maybe he could tell because of the victory conditions or that I had 3 original capitals? I have no idea.