International human rights law is the body of international law designed to promote human rights on social, regional, and domestic levels. As a form of international law, international human rights law is primarily made up of treaties, agreements between sovereign states sintered to have binding legal effect between the parties that have agreed to them; and customary international law, rules of law derived from the consistent conduct of states acting out of the belief that had the law required them to act that way. Other international human rights instruments while not legally binding contribute to the implementation, understanding and development of international human rights law and have been recognised as a source of political obligation.
Enforcement of international human rights law can occur on either a domestic, a regional or an international level. States that ratify human rights treaties commit themselves to respecting those rights and ensuring that their domestic law is compatible with international legislation. When domestic law fails to provide a remedy for human rights abuses, parties may be able to resort to regional or international mechanisms for enforcing human rights.
The relationship between international human rights law and humanitarian law is disputed among international law scholars. This discussion forms part of a larger discussion on fragmentation of international law. While pluralist scholars conceive international human rights law as being distinct from international humanitarian law, proponents of the constitutionalist approach regard the latter as a subset of the former. In a nutshell, those who favors separate, self-contained regimes emphasize the differences in applicability; international humanitarian law applies only during armed conflict. On the other hand, a more systemic perspective explains that international humanitarian law represents a function of international human rights law; it includes general norms that apply to everyone at all time as well as specialized norms which apply to certain situations such as armed conflict between both state and military occupation (i.e. IHL) or to certain groups of people including refugees (e.g. the 1951 Refugee Convention), children (the Convention on the Rights of the Child), and prisoners of war (the 1949 Geneva Convention III).
In primitive societies, organisation was based on communalism. The emergence of states saw the organisation and distribution of power based on law. With this came the growth of "rights" and evolving notions of what they constitute, and eventually the development of "human rights law."