If you live long enough you will experience conflict. The chance that everyone will like us or get along with us is very minimal. Inevitably we will disagree with someone. When this happens, handling the conflict with a level head avoids stress and keeps the chance of the conflict escalating less likely.
Handling conflict does not have to be confrontational in the classic sense. When someone mentions an altercation we think of the showdown at the OK Corral. Coming into the meeting ready to fight is not the best way to handle a conflict.