Which concepts played the biggest role in unifications of Italy and Germany?

* Nationalism: The idea of a unified Italy gained momentum in the 19th century as Italians sought to end foreign domination and establish a nation-state.

* Liberal ideas from the French Revolution: The French Revolution's ideals also stirred the Italians desire to establish a free and independent state based on the principles of popular sovereignty and individual rights.

* Leadership: Key figures such as Giuseppe Mazzini and Camillo Benso, Count of Cavour, provided leadership and strategic vision for the unification movement, guiding it through diplomatic negotiations and military campaigns.

Germany

* Nationalism and Patriotism: The 19th century saw a resurgence in German national pride and a desire for unification. The growth of nationalism prompted calls for a united Germany that transcended the territorial boundaries of the various German states.

* Liberal and Democratic Ideas: The influence of liberal and democratic ideals spread across Germany, and the people began to clamor for political reforms and a constitutional government.

* Prussian Leadership and Realpolitik: Under Prussian leadership, specifically Otto von Bismark, Germany was unified through realpolitik, or power politics. Bismark skillfully orchestrated a series of diplomatic alliances and military victories to achieve German unification.