"War" has always been one of the most serious problems of mankind. By the middle of this century, with the dawn of the atomic age, the potential for nuclear war has become clearly the most serious problem. Although conventional wars are still with us, in spite of all efforts to curtail them; we have so far managed to avoid nuclear war. This situation, however, is too precarious and could break down at any time with catastrophic results. The question, therefore, is how to decrease the probability of such breakdown and stabilize the situation in the long run.