The NSC [National Security Council] was established in the 1947 National Security Act, which named the members of the council: president, vice president and secretaries of state and defense. The function of the council “shall be to advise the president with respect to the integration of domestic, foreign, and military policies relating to the national security.” The law required regular meetings…
Mr. Kissinger grew the council to include one deputy, 32 policy professionals and 60 administrators. By my count, alumni of his NSC include two secretaries of state, four national security advisers, a director of national intelligence, a secretary of the Navy, and numerous high-ranking officials in the State, Defense and Treasury departments as well as the Central Intelligence Agency.
But the NSC has only continued to expand. By the end of the Obama administration, 34 policy professionals supported by 60 administrators had exploded to three deputies, more than 400 policy professionals and 1,300 administrators.
The council lost the ability to make fast decisions informed by the best intelligence.
Here is more from John Lehman (WSJ).