United Nations Security Council
Along with the five permanent members, the Security Council of the United Nations has temporary members that hold their seats on a rotating basis by geographic region. Non-permanent members may be involved in global security briefings. In its first two decades, the Security Council had six non-permanent members, the first of which were Australia, Brazil, Egypt, Mexico, the Netherlands, and Poland. In 1965, the number of non-permanent members was expanded to ten.
Permanent members of the United Nations Security Council
In 2013, the P5 and G4 members of the UN Security Council accounted for eight of the world's ten largest defence budgets, according to the Stockholm International Peace Research Institute (SIPRI).
The following are the heads of state and government that represent the permanent members of the UN Security Council :