Let me add one more point to this discussion.
One could also view this game of Civilization as just a looong string of "zeros" and "ones" inside your computer's main memory. There aren't any horsemen, there aren't any nations and no one is getting killed... It's all in your head...
If someone takes this point of view, then it would of course make absolutely no sense to apply any "ethic" or "moral" rules to this game. Why should "0010110101110101" be fine, while "010011010100110" is to be "morally" condemned? The human player is sitting on front of his/her PC and trying to control the string of zeros and ones in such a way that the ultimate goal (the words "Congratulation! You have achieved victory" being printed onto your computer screen) is arrived at in the "best" way. So far so good.
But now let's take a closer look at the meaning of "best" and at the player him/herself. I think the ultimate goal is to achieve some kind of pleasure/enjoyment out of the game, and there are two kinds of players:
- some get the most pleasure out of finding the "most efficient" or "fastest" solution to the problem of getting the victory message printed onto the screen.
- and for some the process of actually playing the game gives the most enjoyment. ("The Journey Is the Goal")
For the first species it indeed doesn't make sense to apply moral judgements. There aren't any real horsemen, tanks or nukes. The actions the players perform with mouse and keyboard only influence a few bits and bytes in a computer's RAM and they are designed solely to bring a "mathematical puzzle" to a fast and efficient end.
For the second kind, however, it might make sense to talk about moral aspects, just in the same way as some players discuss whether it is "honorable" to commit a RoP rape or to buy a tech for gpt + a luxury and then break the trade route, so that the AI opponent is tricked out of the "goods" that would rightfully "belong" to "him".
So far I have been talking only about single-player games. If we additionaly take multi-player games into consideration, the picture changes completely, because now it's not only you, who tries to get enjoyment out of the game, but also 5-6 more human beings, who have feelings like yourself and who have the same right to strive for enjoyment as you do. (In fact, in this setup the comparison to Chess makes more sense: not with regards to whether it is "unethical" that the white queen "kills" the black pawn -- I can tell you: the black pawn doesn't care a bit whether he is still standing on the chessboard or being put back into the box... it's just a lifeless piece of wood... -- but with regards to your opponent. Bobby Fischer once said, in a game of chess he likes to "crush the mind of his opponent", and this is certainly an act of violence.)
And similarly in a multi-player Civilization game the actions of your mouse and keyboard go beyond just changing bits and bytes in your computer's RAM: they now have influence on the feelings and well-being of fellow human beings, so I think now applying moral standards begins to make sense.
In fact, in my multi-player games I play much different than in my single-player games. I enjoy it much more to cooperate with the other humans and to help each other advance through the ages, than to confront them. (Except for scenarios like WW I and WW II, which were geared towards war and nothing else.) In one of the games I used invisible Ninjas to kill the King unit of a fellow player, and I still feel remorse about that... Unfortunately only one player can win in the end, and also there are some players who only see the "future potential enemy" in every fellow player... With these of course it is difficult to live in peaceful cooperation.
But I guess this just reflects real life: some people like to help each other and that way make life easier for all involved, while others only see a potential competitor in every fellow human being.
Lanzelot