The United Nations Security Council (UNSC) is one of the six principal organs of the United Nations and is charged with the maintenance of international peace and security as well as accepting new members to the United Nations and approving any changes to its United Nations Charter.critics of the council often describe it ad undemocratic body, and argue it fails its principal task, mainly because of the veto power granted to only five of its members. Its powers include the establishment of peacekeeping operations, the establishment of international sanctions, and the authorization of military action through Security Council resolutions; it is the only UN body with the authority to issue binding resolutions to member states. The Security Council held its first session on 17 January 1946.