Hart drew, among others, on Glanville Williams who had demonstrated his legal philosophy in a five-part article, "Language and the Law" and in a paper, "International Law and the Controversy Concerning the Word 'Law'". In the paper on international law, he sharply attacked the many jurists and international lawyers who had debated whether international law was "really" law. They had been wasting everyone's time, for the question was not a factual one, the many differences between municipal and international law being undeniable, but was simply one of conventional verbal usage, about which individual theorists could please themselves, but had no right to dictate to others.