Why is Maria Theresa considered an important ruler in 18th-century European power politics?

Maria Theresa is considered a pivotal figure in 18th-century European power politics primarily for her role in transforming the Habsburg monarchy from a vulnerable collection of disparate lands into a more unified and resilient state.1

Her significance stems from several key areas:

• Military and Financial Reform: Determined to ensure the monarchy could defend itself, she implemented sweeping reforms to create an effective standing army. To fund this, she overhauled the financial system by negotiating long-term tax contributions, which eroded the power of local estates and established a reliable, centralized budget.21
• Diplomatic Strategy: She navigated the War of the Austrian Succession and the Seven Years’ War against militarily superior opponents, preserving the bulk of her territory. Her diplomatic acumen was highlighted by the famous reversal of alliances, where she abandoned the traditional alliance with England to partner with France.31
• Administrative Centralization: She modernized the state through an enlarged central administration, separated the judiciary from other government functions, and institutionalized reforms in education and public health.1

By strengthening the internal structure of her domains, she provided the Habsburgs with the stability necessary to remain a major power on the European stage.1