The document discusses the evolution of territoriality and nation-states. It explains that humans have an innate need to belong to larger groups that control territory. The rise of nation-states began in the 1500s as military technology advanced, requiring larger, more centralized states for defense. The 1648 Peace of Westphalia established the modern system of independent nation-states based on clearly defined territories with sovereign control. Nation-states emerged fully during the French Revolution, with loyalty owed to the nation rather than a monarch. Characteristics like a state's size, shape, location can influence its challenges and opportunities for governance.