@Ragnarok-X:
It was already posted earlier in this thread:
http://forum.shrapnelgames.com/showthread.php?t=35160
edit: ups, ninja'd
@3V4JKZ2:
Never been in a game that needed a rule to enforce agreements (speaking about Dom1 & 2 here): players are very unlikely to not honour them, because opponents backstabbed develop grudges, & a bad reputation can bite you in future games (or even in the same one).
Some gaming groups enjoy a well executed backstab, that did not seem to be the case in this community, at least in my experience.
It's basically a repeated prisoner's dilemma, which makes diplomacy the most powerful tool in the game:
http://en.wikipedia.org/wiki/Repeate...er.27s_dilemma
However, different interpretations of what was agreed are common (be that the word, or the spirit of the agreement), so disputes arise anyway.