I read From Apology to Utopia for one of my classes and it was worth alone the entire MSc.
Let alone the expertise, the research, the cross-field knowledge, the prose, I was profoundly impressed by the humanity I found within this essay.
By discussing law, Koskenniemi writes about human nature with clarity, and in doing so miraculously does not fall into neither sugarcoating or cynicism.
Indeed, he firmly explain that the crucial human quality is not the good or the evil, but the choice upon them, the choice of defining what constitutes each of them and the choice of what course of action to pick between them.
This is a great read, highly recommended. It has made me a more aware human and a better citizen.