My enemy's enemy is my friend' for it is easier to share an enemy than a friend. We create traditions overnight and call them 'ancient'. And if, by chance, we have no enemies, we create them. By definition, we are 'good' and others, if not 'bad', are potentially so. The sense of unity, purpose, and identity that comes from membership of a society is bought at a fearful price - the waging of war.
War is the ultimate tool of social and political control.
And war is a black hole that sucks us in, for once our trust in our fellow human being is lost - once we believe that he will cut our children down with his knife, we will cut down his children and we will continue until exhaustion threatens our own extinction. It is not unusual for the very quality that makes something good to make it bad also. There is a natural conflict between the two. Community implies conformity with the group while a sense of individuality pulls us is precisely the opposite direction. It is good to have a strong sense of community.