Politics is the process and method of gaining or maintaining support for public or common action, the conduct of decision-making for groups. Although it is usually applied to governments, political behavior is also observed in corporate, academic, religious, and other institutions. Political philosophy is the study of topics such as politics, liberty, justice, property, rights, law, and the enforcement of a legal code by authority: what they are, why (or even if) they are needed, what, if anything, makes a government legitimate, what rights and freedoms it should protect and why, what form it should take and why, what the law is, and what duties citizens owe to a legitimate government, if any, and when it may be legitimately overthrown, if ever. Political science is the field devoted to studying political behavior and examining the acquisition and application of power, or the ability to impose one's will on another. Its practitioners are known as political scientists. Political scientists look at elections, public opinion, institutional activities, the ideologies behind various politicians and interest groups, how politicians achieve and wield their influence, and so on.
The United Nations (UN) is an intergovernmental organization established on 24 October 1945 to promote international co-operation. A replacement for the ineffective League of Nations, the organization was created following the Second World War to prevent another such conflict. At its founding, the UN had 51 member states; there are now 193. The UN Headquarters is situated in Manhattan, New York City and enjoys extraterritoriality. Further main offices are situated in Geneva, Nairobi and Vienna. The organization is financed by assessed and voluntary contributions from its member states. Its objectives include maintaining international peace and security, promoting human rights, fostering social and economic development, protecting the environment, and providing humanitarian aid in cases of famine, natural disaster, and armed conflict. During the Second World War, US President Franklin D. Roosevelt initiated talks on a successor agency to the League of Nations, and the United Nations Charter was drafted at a conference in April–June 1945; this charter took effect on 24 October 1945, and the UN began operation. Non-governmental organizations may be granted consultative status with ECOSOC and other agencies to participate in the UN's work. The organization won the Nobel Peace Prize in 2001, and a number of its officers and agencies have also been awarded the prize. Other evaluations of the UN's effectiveness have been mixed. Some commentators believe the organization to be an important force for peace and human development, while others have called the organization ineffective, corrupt, or biased.