I honestly think a balance. However, if one has to choose, I believe it would be compromise. Compromise is the way that humanity has survived. I have worked on tolerance a lot for the sake of my relationship with my girlfriend because we do have differing beliefs, but also because if I don't make the change in my own life, who will? However, in our relationship, it could not be sustained without compromise. I believe that relationships are a good basis for other things simply because a relationship is modeled the same way as everything else. If things are not equal and fair, it falls apart.
I see them as being intertwined, and it being a very situational occurrence.