National Security Council Memorandum Number 68 (1950)


Within the past thirty-five years the world has experienced two global wars of tremendous violence. It has witnessed two revolutions--the Russian and the Chinese--of extreme scope and intensity. It has also seen the collapse of five empires--the Ottoman, the Austro-Hungarian, German, Italian and Japanese--and the drastic decline of two major imperial systems, the British and the French. During the span of one generation, the international distribution of power has been fundamentally altered. For several centuries it had proved impossible for any one nation to gain such preponderant strength that a coalition of other nations could not in time face it with greater strength. The international scene was marked by recurring periods of violence and war, but a system of sovereign and independent states was maintained, over which no state was able to achieve hegemony.

Two complex sets of factors have now basically altered this historical distribution of power. First, the defeat of Germany and Japan and the decline of the British and French Empires have interacted with the development of the United States and the Soviet Union in such a way that power has increasingly gravitated to these two centers. Second, the Soviet Union, unlike previous aspirants to hegemony, is animated by a new fanatic faith, antithetical to our own, and seeks to impose its absolute authority over the rest of the world. Conflict has, therefore, become endemic and is waged, on the part of the Soviet Union, by violent or non-violent methods in accordance with the dictates of expediency. With the development of increasingly terrifying weapons of mass destruction, every individual faces the ever-present possibility of annihilation should the conflict enter the phase of total war.

On the one hand, the people of the world yearn for relief from the anxiety arising from the risk of atomic war. On the other hand, any substantial further extension of the area under the domination of the Kremlin would raise the possibility that no coalition adequate to confront the Kremlin with greater strength could be assembled. It is in this context that this Republic and its citizens in the ascendancy of their strength stand in their deepest peril. . . .

Military Evaluation of U.S. and U.S.S.R. Atomic Capabilities

1. The United States now has an atomic capability, including both numbers and deliverability, estimated to be adequate, if effectively utilized, to deliver a serious blow against the war-making capacity of the U.S.S.R. It is doubted whether such a blow, even if it resulted in the complete destruction of the contemplated target systems, would cause the U.S.S.R. to sue for terms or present [prevent] Soviet forces from occupying Western Europe against such ground resistance as could presently be mobilized. A very serious initial blow could, however, so reduce the capabilities of the U.S.S.R. to supply and equip its military organization and its civilian population as to give the United States the prospect of developing a general military superiority in a war of long duration.

2. As the atomic capability of the U.S.S.R. increases, it will have an increased ability to hit at our atomic bases and installations and thus seriously hamper the ability of the United States to carry out an attack such as that outlined above. It is quite possible that in the near future the U.S.S.R. will have a sufficient number of atomic bombs and a sufficient deliverability to raise a question whether Britain with its present inadequate air defense could be relied upon as an advance base from which a major portion of the U.S. attack could be launched.

It is estimated that, within the next four years, the U.S.S.R. will attain the capability of seriously damaging vital centers of the United States, provided it strikes a surprise blow and provided further that the blow is opposed by no more effective opposition than we now have programmed. Such a blow could so seriously damage the United States as to greatly reduce its superiority in economic potential.

Effective opposition to this Soviet capability will require among other measures greatly increased air warning systems, air defenses, and vigorous development and implementation of a civilian defense program which has been thoroughly integrated with the military defense systems.

In time the atomic capability of the U.S.S.R. can be expected to grow to a point where, given surprise and no more effective opposition than we now have programmed, the possibility of a decisive initial attack cannot be excluded.

3. In the initial phases of an atomic war, the advantages of initiative and surprise would be very great. A police state living behind an iron curtain has an enormous advantage in maintaining the necessary security and centralization of decision required to capitalize on this advantage.

4. For the moment our atomic retaliatory capability is probably adequate to deter the Kremlin from a deliberate direct military attack against ourselves or other free peoples. However, when it calculates that it has a sufficient atomic capability to make a surprise attack on us, nullifying our atomic superiority and creating a military situation decisively in its favor, the Kremlin might be tempted to strike swiftly and with stealth. The existence of two large atomic capabilities in such a relationship might well act, therefore, not as a deterrent, but as an incitement to war.

5. A further increase in the number and power of our atomic weapons is necessary in order to assure the effectiveness of any U.S. retaliatory blow, but would not of itself seem to change the basic logic of the above points. Greatly increased general air, ground and sea strength, and increased air defense and civilian defense programs would also be necessary to provide reasonable assurance that the free world could survive an initial surprise atomic attack of the weight which it is estimated the U.S.S.R. will be capable of delivering by 1954 and still permit the free world to go on to the eventual attainment of its objectives. Furthermore, such a build-up of strength could safeguard and increase our retaliatory power, and thus might put off for some time the date when the Soviet Union could calculate that a surprise blow would be advantageous. This would provide additional time for the effects of our policies to produce a modification of the Soviet system.

6. If the U.S.S.R. develops a thermonuclear weapon ahead of the U.S., the risks of greatly increased Soviet pressure against all the free world, or an attack against the U.S., will be greatly increased.

7. If the U.S. develops a thermonuclear weapon ahead of the U.S.S.R., the U.S. should for the time being be able to bring increased pressure on the U.S.S.R. . . .

In the light of present and prospective Soviet atomic capabilities, the action which can be taken under present programs and plans, however, becomes dangerously inadequate, in both timing and scope, to accomplish the rapid progress toward the attainment of the United States political, economic, and military objectives which is now imperative.

A continuation of present trends would result in a serious decline in the strength of the free world relative to the Soviet Union and its satellites. This unfavorable trend arises from the inadequacy of current programs and plans rather than from any error in our objectives and aims. These trends lead in the direction of isolation, not by deliberate decision but by lack of the necessary basis for a vigorous initiative in the conflict with the Soviet Union.

Our position as the center of power in the free world places a heavy responsibility upon the United States for leadership. We must organize and enlist the energies and resources of the free world in a positive program for peace which will frustrate the Kremlin design for world domination by creating a situation in the free world to which the Kremlin will be compelled to adjust. Without such a cooperative effort, led by the United States, we will have to make gradual withdrawals under pressure until we discover one day that we have sacrificed positions of vital interest.

It is imperative that this trend be reversed by a much more rapid and concerted build-up of the actual strength of both the United States and the other nations of the free world. The analysis shows that this will be costly and will involve significant domestic financial and economic adjustments.

The execution of such a build-up, however, requires that the United States have an affirmative program beyond the solely defensive one of countering the threat posed by the Soviet Union. This program must light the path to peace and order among nations in a system based on freedom and justice, as contemplated in the Charter of the United Nations. Further, it must envisage the political and economic measures with which and the military shield behind which the free world can work to frustrate the Kremlin design by the strategy of the cold war; for every consideration of devotion to our fundamental values and to our national security demands that we achieve our objectives by the strategy of the cold war, building up our military strength in order that it may not have to be used. The only sure victory lies in the frustration of the Kremlin design by the steady development of the moral and material strength of the free world and its projection into the Soviet world in such a way as to bring about an internal change in the Soviet system. Such a positive program--harmonious with our fundamental national purpose and our objectives--is necessary if we are to regain and retain the initiative and to win and hold the necessary popular support and cooperation in the United States and the rest of the free world.