There is a natural harmony in the world. Everything balances out to give us this beautiful unity in the world and how it functions. Buddhism and Taoism emphasize this. Look into eastern religions. 

A community needs to be united to be strong. You are naturally attached to one another and rely on one another to form a community, so you should unite to help each other to allow harmony.

Unity is one of the most important on the road to stamping out terror. You need global rules of law and other, and they have to be enforce. Unity is power that encourage us to fight against any problem and let us go forward without any fear. It maintains peace in our life and let us live our life happily.
That is why we need unity........