Xunzi and The Kautilya Arthasastra are full of rich philosophical thoughts on inter-state relations. This article undertakes a comparison between them in terms of their methods of writing, views on the nature of inter-state systems and arguments about a state’s comprehensive power. This article finds that the leadership’s determination and emphasis on morality are two important shared mentalities between Xunzi and Kautilya. Both attribute the rise and fall of a state mainly to state leadership rather than material factors or the political system.