Intergovernmental organizations are an important aspect of public international law. IGOs are established by a treaty that acts as a charter creating the group. Treaties are formed when lawful representatives (governments) of several states go through a ratification process, providing the IGO with an international legal personality.
Intergovernmental organizations in a legal sense should be distinguished from simple groupings or coalitions of states, such as the G7 or the Quartet. Such groups or associations have not been founded by a constituent document and exist only as task groups.
Educational organizations — centered around tertiary-level study. EUCLID University was chartered as a university and umbrella organization dedicated to sustainable development in signatory countries; United Nations University researches pressing global problems that are the concern of the United Nations, its Peoples and Member States.
Health and Population Organizations — based on common perceived health and population goals. These are formed to address those challenges collectively, for example the intergovernmental partnership for population and development Partners in Population and Development.