"Diplombacy for Dumbies".
Hehe!
I agree with Fleecemaster.
There are so many different ways to play a "diplomacy", and people don't seem to realize that.
For instance, people try to limit aggression (complex declaration rules and so forth, which limit you from making war) and they want to attack "warmongers".
Well, as a thought experiment, would you be happy with a game where no one ever attacks anyone?
If not, why not?
(And if you say 'no', but speak poorly of 'warmongers', you might want to examine your position a little more critically. The word 'hypocrisy' comes to mind... your games wouldn't work without some of these 'warmongers' in them!)
Ultimately, for such a specialized mode of play, you need to play with a group of people who have created a consistent culture of play and implicitly understand who it works. That's pretty difficult with a bunch of strangers, but much easier if you always play with the same people. Just be prepared for 'growing pains'.
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Ultimately, the game you play should support what you're trying to do. Rules matter, here. Want a super-friendly game? Change the defense/offense ratio *drastically* in favour of the defender (say, 10% offense, 90% defense). It will work much better than writing a long list of "Declaration" rules in ALL CAPS and then yelling at people for forgetting them in the middle of the game, trust me...
Most Diplomacy games I've seen do NOT support the style of play at all. Hence all the threads complaining about them! It's clear cause and effect.
Anyone who has played the actual boardgame "Diplomacy" would see very quickly how the rules of that game create a very specific style of play. You don't need "rules" - just a game which naturally encourages the sort of play you want as the most effective way of playing it.
Here's some more good discussion and reading on this topic, if you're curious in my point of view:
https://www.warlight.net/Forum/107248-diplomacy-gamemode-warlight
Edited 6/16/2016 21:10:29