Interest in the thought of Hugo Grotius on international law and ethic
s is justified inasmuch as he attempted to define a theoretical positi
on between an idealism he thought counterproductive and an amoral real
ism he found unacceptable. Grotius constructed a system in which the m
oral authority of natural law was combined with the flexibility of hum
an law. This required him to develop a special understanding of the na
ture and relation of these two types of law. In giving the law of nati
ons, as a product of human will, the authority to suspend provisions o
f natural law he provided for a code of international conduct that cou
ld permit injustice where necessary, without abandoning moral ideals a
ltogether.