Make and keep this promise to yourself:

"I commit myself to live in harmony with everyone, to
Harm no one, physically, emotionally, financially, to
Encourage others to do likewise; and to
Defend against all threats to
Life, Liberty, and Pursuit of Joy."

Take this seriously and truely make an effort to live up to this promise.  If you (and others) really do this - not just be impressed by the pretty words - the time will come when we will build the critical mass of peace-builders to cause a global revolution resulting in a peaceful civilization. 

I believe world peace is possible!