The national security act of 1947 reflected:

Hello There!

On July 27, 1947, President Truman was the one who signed the National Security Act of 1947 and this created a postwar national security framework. This reflected the greater role of the united states in world affairs.

The greater role of the United States in world affairs.

Explanation:

The National Security Act of 1947 took effect on September 18, 1947. It consisted of a major restructuring of the United States government's military and intelligence agencies following World War II. The Act also established the National Security Council and the Central Intelligence Agency. All these changes reflected the greater role of the United States in world affairs.