… pressures eroding the prohibition on the use of force are deplorable, and the arguments to legitimize the use of force in those circumstances are unpersuasive and dangerous … Even “humanitarian intervention” can too readily be used as the occasion or pretext for aggression. Violations of human rights are indeed all too common, and if it were permissible to remedy them by external use of force, there would be no law to forbid the use of force by almost any state against almost any other. Human rights, I believe, will have to be vindicated, and other injustices remedied, by other, peaceful means, not by opening the door to aggression and destroying the principle advance in international law, the outlawing of war and the prohibition of force.
Louis Henkin, How nations behave: law and foreign policy, pp. 144–145