Why did president Truman create the national security at?

President Truman Created the National Security because he wanted to oversee the nation's military establishment which also made the nation security council and separate departments for each branch of the armed forces.

Explanation:

- three-quarters or two-thirds..

- "the constitution provides that an amendment may be proposed either by the congress with a two-thirds majority vote in both the house of representatives and the senate or by a constitutional convention called for by two-thirds of the state legislatures."

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the main reason that the constitution did not proclaim all men to be free and equal is because of the issue of slavery.