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Difficulty: Very hardOrigins of the Cold War and Containment

Source: Senator Robert A. Taft, speech in the United States Senate opposing ratification of the North Atlantic Treaty, July 11, 1949:

"I cannot vote for a treaty which, in my opinion, will do far more to bring about a third world war than it will to maintain peace. . . . [The treaty] is a part of a much larger program, which can only be understood if we look at it as a whole. That program is the arming of Western Europe. . . . If we agree to arm these nations, we agree to a policy which must result in a clash of arms. . . . It is a complete departure from the traditional foreign policy of the United States."

Which of the following developments in the late 1940s most directly contributed to the political consensus that overrode the objections raised by Taft in the excerpt?

  1. The Soviet blockade of West Berlin, which demonstrated the limits of economic containment and convinced Western leaders of the need for a collective military alliance.Answer
  2. B
    The outbreak of the Korean War, which forced the Truman administration to expand its containment policy beyond Europe to East Asia.
  3. C
    The announcement of the Marshall Plan, which proved that the United States would prioritize unilateral military intervention over economic aid.
  4. D
    The passage of the National Security Act of 1947, which prohibited the United States from entering into peacetime military alliances with European nations.

Answer

The Soviet blockade of West Berlin, which demonstrated the limits of economic containment and convinced Western leaders of the need for a collective military alliance.
The Soviet blockade of West Berlin (1948–1949) was a primary catalyst for the creation of NATO. By blocking ground access to West Berlin, the Soviet Union demonstrated that economic recovery initiatives like the Marshall Plan were insufficient to deter direct military pressure. This crisis convinced Western policymakers and a bipartisan consensus in the United States that a formal, collective military alliance was necessary to guarantee European security, successfully overriding traditional isolationist arguments like those raised by Senator Taft.

Step-by-Step Solution

1
Analyze the stimulus document to identify the speaker's main objection and historical context.
Senator Robert A. Taft is opposing the ratification of the North Atlantic Treaty (NATO) in July 1949, arguing that committing to arm Western Europe departs from traditional US foreign policy and increases the risk of war with the Soviet Union.
Establishing the core argument of the critic is essential to understanding the foreign policy transition taking place.
2
Identify the historical events of the late 1940s that created a political consensus in favor of peacetime military alliances, overriding traditional non-entanglement principles.
The Soviet blockade of Berlin (1948–1949) showed that economic assistance alone (like the Marshall Plan) could not deter aggressive Soviet geopolitical maneuvers, making a collective defense pact politically viable.
Connecting the transition from economic to military containment to its direct historical catalyst ensures causal accuracy.
3
Evaluate the chronological and conceptual validity of all options.
The Berlin Blockade occurred directly before the treaty's ratification, whereas the Korean War occurred in 1950, the Marshall Plan was economic rather than military, and the National Security Act did not ban alliances.
Chronological precision prevents the misattribution of causes that occurred after the event in question.

Key Concept

The transition of United States containment policy from economic recovery programs to collective military alliances in response to direct Soviet challenges.
Estimated Time:2m 0s
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Origins of the Cold War and Containment

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