Willfull earnings

While, I never thought my family would be the ones to fight over a will. I have started to learn that families aren't as close as you might think. one side of the family lies to the other, they argue and I feel like all people see are materilistic and dollar signs. But what do you do when your caught in the middle and all you want is everyone to get along. Its hard....its emotionally draining and not to mean pointless. If your family is going through the same thing, then Help me! I am torn between my mom and aunt -cousins and grandfather, I just want everyone to be a family again. But I don't see that happening. Any advice?