Non-state actors are individuals or organizations that have influence at a national or international level but do not belong to any state. There are three main types of non-state actors: sub-state actors like trade unions that influence domestic policy; intergovernmental organizations (IGOs) like the UN and WTO that coordinate policies between states; and nongovernmental organizations (NGOs) like Amnesty International that advocate for issues and influence state and IGO policies. While states remain important actors, non-state actors have increasing power in international relations as globalization continues.