When World War 2 finally came to an end, one delegate from 51 countries (including Canada) created the charter for the formation of the United Nations. The UN was given three powers for and aggressor nation who creates conflict:
1.)condemn the aggressor through speech
2.)use economic sanctions (urging other UN members to not trade with the aggressor nation.
3.)respond using the military by sending in an armed force to deal with the conflict.
Also there were five special countries who had a veto power (Britain, France, China, United States, and Russia), which means they have the right to reject a decision or proposal made.
The United Nations also formed the World Health Organization (WHO) and UNICEF. Both of these organizations were formed to get rid of famine, disease, and to protect human rights.