Which theory of international relations explains why states

Which theory of international relations explains why states.
Which theory of international relations explains why states join international organizations and participate in international law? Answer this question using assumptions from either liberalism/constructivism or realism, and draw upon evidence from our discussions of the United Nations, the European Union, and other aspects of international organization. Don t forget to rebut or disprove the theory that does not offer a good explanation. Format: 12-point-font, Times New Roman, 1-inch margins, double-spaced. No cover page, no large header on the first page. Three pages total. Don t forget citations and a bibliography. Points will be deducted if the format is incorrect. First Third of first page is introduction Body paragraphs until the end of the second page includes assumptions of the best theory of international relations exaplins why states join international organizations and participate in international law?last page should be the worst theory that explains why states join IO s and participate in international law and reason 2/3 sentence conclusion3 pages long
Which theory of international relations explains why states