In this book we analyze the great challenges that humanity would have to overcome if we want to achieve a stable and lasting peace for the new millennium. A first big problem is to end hunger and poverty in the world and achieve a global equalization of wealth. The second great challenge of our days is to try to solve the problem of moral degradation and widespread corruption at all levels of society. A third major challenge is to prevent the wars and conflicts between nations, ethnic groups or cultures that caused such disastrous humanitarian consequences in the twentieth century, as well as to solve the serious problem of international terrorism.