Teach your self to live in the awareness of love and you help the human collective manifesting world-peace.
War and strife are expressions of hatred. Hatred is caused by an inner tension that has its roots in fear. In human beings fear is an unconscious reaction on part of the ego. It causes disharmony in the individual self and with disharmony comes tension. Collectively shared fears and tensions create war and strife in the exterior world.
On the other hand, peace is an expression of harmony and harmony is a by-product of love awareness.
Love awareness brings understanding, acceptance. Where there is understanding and acceptance there is effortless harmony and thus also the absence of tensions.