hould constructivism be classified as a mainstream or a critical branch of IR theory?

QUESTION: Should constructivism be classified as a mainstream or a critical branch of IR theory?

Please follow the structure:

Paragraph 1: what is the difference between a mainstream theory (examples of neo-liberalism and neo-realism) and critical theory? (Define both) compare and contrast. Use reference: (Adler, 2000)

Paragraph 2- possible criticisms of constructivism? use work of max weber, talcott parsons and Hopf: (the promise of constructivism in international relations theory < article name)

Paragraph 3: should constructivism be classified as mainstream international relations theory? Yes, why? Use reference (Jacobsen, 2003)