If you are a conservative and this ideological struggle has not registered as a concern worthy of your attention, read the essay by this title.  The introduction makes clear what is at stake:
In the coming years of the twenty-first century the ideology, institutions, and forces of “global governance” will directly challenge the legitimacy and authority of the liberal democratic nationstate and American constitutional sovereignty. What is this ideology, what are these institutions and forces, and how do they challenge liberal democracy and American sovereignty?
The conclusion makes clear that this is more than an academic debate.
In summation, the perennial question of politics (who shall govern and in what regime?) remains contested at the beginning of the twenty-first century. The liberal democratic nation-state in general and American constitutionalism in particular will confront what is perhaps the greatest challenge ever to their moral authority and legitimacy from the ideology and forces of global governance. This challenge is “existential” because it challenges the existence of the American constitutional democratic regime. It is formidable because it comes from within Enlightenment thought and Western civilization. It will be the great challenge of the twenty-first century.