The Security Council has primary responsibility, under the United Nations Charter, for the maintenance of international peace and security. Today the P5 (permanent members) or simply speaking just 5 countries determine the fate of millions during a seize, war or invasion. -by their "veto power by nullifying any attempt to join a conflict or break down an invasion. These countries being the United States, China, France, Russia, and the United Kingdom. However this group has now become polarized due to which most actions are vetoed out by either group A or B.
Group A: China, Russian Fed
Group B: USA, UK, France
Other countries who have nuclear capability but do not have a permanent seat being Pakistan, India, Israel, and North Korea. So should some of these countries also be included in the P5 to make it P7 and bring more stability and rationality to the powers given to P5, who in most cases cannot really work together and oppose each other using their Veto card.