He asserts that peace begins with each of us as individuals. To have outer peace, we must first have inner peace.
Peace is love.
Certainly part of unconditional love is to learn to love and accept oneself, and then love one's neighbor as oneself. Love is the solution to our problems. If I love you, I will not harm, wrong or cheat you. I will not steal or kill. Following the Golden Rule of doing to others what you would have them do to you is a good guide.