This is quite a critique of US foreign policy. And this is an interesting statement.
Prudent American realism, as opposed to a more traditional realism, recognizes that the internal character of regimes matters and that foreign policy must reflect the fundamental principles of liberal democracy. And unlike liberal internationalism, which holds that international law and institutions alone are sufficient to achieve peace, prudent American realism understands that there are certain problems that can be addressed only through the prudent exercise of power. Thus, the strategic objective of prudent American realism is to maintain a liberal world order characterized by freedom and prosperity.