From 1648 to 1815, Europeans argued over who held legitimate political authority. Their answers shaped diplomacy, law, taxation, military organization, and the relationship between rulers, elites, and ordinary people.

Westphalia and the State System

The years after the Peace of Westphalia in 1648 are often treated as a major turning point in European politics.

Political map of Europe in 1648, commonly used to illustrate the territorial landscape associated with the Peace of Westphalia. It helps clarify why “sovereignty” became increasingly tied to bounded territories and why diplomacy and alliance-making mattered in a competitive state system. Source

Westphalia ended the Thirty Years’ War and weakened older ideas that Europe should be united under a universal religious or imperial authority. Instead, political life increasingly centered on territorially based states.

The key idea was sovereignty.

Westphalia did not instantly create modern nation-states, and many rulers still governed diverse lands with different laws and customs. Even so, it strengthened the principle that rulers had authority within recognized borders and that states should deal with one another through treaties and diplomacy rather than through claims of universal empire.

Relations Among European States

After 1648, relations among states became more secular and strategic. Rulers still fought wars, but they increasingly did so in terms of state interest rather than purely religious struggle. This shift encouraged:

• Permanent diplomacy, with ambassadors representing state interests abroad

• Treaty systems, which recognized the legal standing of states

• Balance-of-power politics, in which alliances shifted to prevent one state from dominating Europe

This meant that sovereignty affected not just domestic rule but also the structure of international politics. States became competitors in a system where survival depended on military strength, taxation, and diplomatic flexibility.

Competing Models of Rule

Although many European rulers accepted the idea of sovereign states, they disagreed about where sovereignty should rest inside those states. The most important models were absolutism, constitutionalism, and, by the late eighteenth century, popular sovereignty.

Absolutism

In many parts of Europe, rulers developed absolutism.

Absolute monarchs tried to reduce the independence of nobles, representative bodies, and local institutions. The classic example was Louis XIV of France, who presented himself as the embodiment of the state.

Hyacinthe Rigaud’s formal portrait of Louis XIV in coronation regalia, emphasizing the ceremonial and visual language of absolutism. The pose, robes, and insignia communicate centralized authority and the idea that sovereignty was embodied in the monarch rather than shared with representative institutions. Source

Under absolutism, sovereignty was associated with the crown, not with the people.

Absolutist rulers expanded:

• Standing armies

• Royal bureaucracies

• Direct taxation

• Court culture that tied nobles to the monarch

Yet absolutism had limits. Monarchs still depended on local elites to collect taxes, enforce laws, and maintain order. In practice, most “absolute” rulers negotiated with privilege, custom, and regional institutions.

Constitutionalism and Mixed Government

A different model developed most clearly in Britain after the Glorious Revolution of 1688–1689. There, sovereignty was not understood as the unchecked will of the monarch.

In Britain, the Bill of Rights and the growing power of Parliament meant that rulers could not govern entirely on their own. Taxation and legislation required cooperation with representative institutions, at least for the propertied classes. This created a different relationship between government and subjects: political authority still remained unequal and elite-dominated, but it was more openly bound to law and consent.

This model did not make Britain democratic. Most people still lacked political rights. However, it showed that sovereignty could be shared or limited rather than concentrated entirely in one monarch.

Enlightened Absolutism

In the eighteenth century, some rulers combined centralized monarchical power with selective reform. Historians often call this enlightened absolutism. Monarchs such as Frederick II of Prussia, Joseph II of Austria, and Catherine the Great of Russia tried to make their states more efficient through legal reform, religious toleration, and administrative centralization.

These rulers did not surrender sovereignty. Instead, they claimed that a strong monarch could best improve society. Their reforms show that sovereignty could be centralized while still taking on a more practical, reform-minded style.

Governments and Their Subjects

Different models of sovereignty reshaped everyday political life. As states became stronger, governments reached more deeply into society. Subjects increasingly experienced the state through:

• Tax collection

• Military recruitment

• Courts and police

• State churches or religious regulation

• Education and administration

Under absolutism, subjects were expected to obey and serve the ruler. Under constitutional systems, at least some elites could claim rights against the government. In both cases, sovereignty changed the expectations placed on rulers and subjects alike.

The language of politics also changed. Government was no longer simply personal rule by a dynasty; it became more closely tied to institutions, administration, and territorial control. This helped produce the modern idea of the state as something larger and more durable than any individual monarch.

A New Claim: Popular Sovereignty

By the late eighteenth century, the most radical challenge to older forms of sovereignty emerged in the idea of popular sovereignty.

This idea developed most dramatically during the French Revolution, when sovereignty was redefined as belonging to the nation.

Decorative 1789 representation of the Declaration of the Rights of Man and of the Citizen, a foundational statement of revolutionary political legitimacy. In study terms, it illustrates the shift from subjects owing obedience to a ruler toward citizens claiming rights grounded in the nation as the source of authority. Source

That shift transformed subjects into citizens, at least in theory, and challenged dynastic and divine-right authority across Europe.

Popular sovereignty did not replace older systems everywhere between 1648 and 1815. Monarchies remained powerful, and many rulers resisted revolutionary change. Still, by the end of the period, European politics contained a major new tension: sovereignty could be claimed by kings, by constitutional institutions, or by the people themselves.