Public International Law

Question:
\”Laws properly so called are a species of commands\” issued by a \”sovereign\” to a \”subject\” and backed by \”the power of affecting others with evil or pain,\” while international law is only a species of \”positive morality\” set by the \”opinions or sentiments current among nations.\”

John Austin, The Province of Jurisprudence Determined, CUP, 1995, pp 30-31

Critically evaluate this statement.

Word Limit: 1,500 words excluding footnotes and bibliography.