See Fundamental principles of IHL;


COUPLAND Robin, “Humanity: What is it and how does it influence International Law?”, in IRRC, No. 844, December 2001, pp. 969-990.
SLIM Hugo, “Sharing a Universal Ethic: the Principle of Humanity in War”, in International Journal of Human Rights, Vol. 2/4, 1998, pp. 28-48.
MERON Theodor, “The Humanization of International Humanitarian Law”, in AJIL, Vol. 94/2, 2000, pp. 239-278