The proliferation of non-state actors in the post–Cold War era has been one of the factors leading to the Cobweb Paradigm in international politics. Under this , the traditional Westphalian nation-state experiences an erosion of power and sovereignty, and non-state actors are part of the cause. Facilitated by globalization, NSAs challenge nation-state borders and sovereignty claims. MNCs are not always sympathetic to national interests, but instead are loyal to the corporation's interests. NSAs challenge the nation-state's sovereignty over internal matters through advocacy for societal issues, e.g. human rights and the environment.