The purpose of this chapter is to show that yoga as a mind-body practice is absolutely relevant for promoting peace worldwide. Yoga proposes to any individual to first cultivate his inner peace and easing his own tensions in order to behave more peacefully with others. Starting from the modern physical practice of yoga in the West, the first part will demonstrate how yoga can first help any practitioner relaxing his own body. As a mind-body practice, yoga has also the ability to help any individual calming down the fluctuations of his mind. Cultivating inner steadiness will help the people reaching a more spiritual state of mind to become open enough to listen more carefully to the universal wisdom taught by yoga. In the second part, an explanation of the philosophical basis and of the roots of yoga will help one to understand how the discipline furthers the art of oneness. The last part will display examples of how yoga is particularly relevant for addressing modern issues that specific population such as refugees, soldiers, and prisoners are facing.