The skills are useless and ineffectual when a person does not want peace. This is the firm rejection of violence. It is the belief that Peace is important and worthwhile. It is forgiveness for real and imagined wrongs. It is win win.
Peace is a feeling.
In spiritual practices, the ultimate degree of success is measured by the degree to which peacefulness is obtained. It is the absence of inner conflict. One does not hear of enlightened men and women wagging war. In fact it is often the opposite. The Dalai Lama, Martin Luther King, Mahatma Ghandi and Nelson Mandela called for the Peaceful resistance to bring justice to their struggles.