Why did Georg Wilhelm Friedrich Hegel believe that war could not be completely eliminated?

Georg Wilhelm Friedrich Hegel believed that war could not be completely eliminated because he viewed each nation-state as an individual entity.1

Drawing on the political theory of Thomas Hobbes, Hegel maintained that in the absence of a higher authority to enforce agreements between sovereign states, pacts are merely words and cannot guarantee peace. Consequently, he rejected the idealism of his predecessor Immanuel Kant, who had proposed a league of nations to establish "perpetual peace," arguing instead that such a vision failed to account for the reality of national sovereignty and the nature of international relations.12