A lot of times, we avoid confrontation and say, "That isn't a battle worth fighting."
The thing is, if the disagreement is in your head and you choose not to address it, you are not actually in the battle. You are in a state of Cold War. Tensions build. Relationships are frayed. Other important efforts are avoided. Doing nothing can last a long time. Doing nothing is a choice.
Sometimes you end up in a battle that you had no intention of fighting. Words were exchanged and emotions were heated. There might even be tears. A poorly-handled conversation does have an advantage. The disagreement is on the table. Even if a little storming takes place, as uncomfortable as it may be, it is better than a cold war. Is anyone else picturing the Airing of Grievances during Festivus?
When there is tension between folks, effective communication diminishes. Whether it is a cold war or an argument, don't let it drop! Find a way to finish the conversation. A popular twitter meme says, "If you have to choose between being right or being kind, choose to be kind." If I choose to be kind rather than to be right, am I choosing to be wrong???
Ideally, you can choose to be kind and continue the important conversation until a win-win decision can be found. Ideally, you can keep talking through your differences until a mutually agreeable answer comes to life. Even if both parties must choose to table the conversation for another time, at least the talking started and the cold war was avoided.