Long ago, people in Europe wanted change. 
Long ago, people in Europe wanted change. 

In Europe, a big idea changed how people lived. This idea is called nationalism. It means people want to belong to a group. They want their own country to rule them. 
Before this, kings and queens ruled many lands. The French Revolution helped start this change. Later, wars led by Napoleon spread these ideas. Many people wanted liberty and equality.
Some groups joined together to make new nations. Germany and Italy were formed this way. Other groups fought to leave big empires. 
In 1848, many revolutions broke out. Famine and money problems made people want change. This led to many new states in Europe. In 1878, leaders met in Berlin. 
Some groups felt unsafe in their homes. The Jewish people looked for a new home too. Theodor Herzl helped start this movement. 
Nationalism is a big idea that changed Europe forever. It is the belief that people should belong to a national group. These groups want to create their own nation-state to protect their interests. 
This change happened in many different ways. Some places, like Germany and Italy, were formed by joining smaller states together. These states shared a common national identity. Other groups fought to leave large empires. For example, Greece, Serbia, and Bulgaria rose up against the Ottoman Empire. Romania is a special case from this time. It joined the regions of Moldavia and Wallachia in 1859. Later, it gained independence in 1878.
Many important events helped spark these feelings. The French Revolution started a movement toward the modern nation-state. Later, the Napoleonic Wars helped spread these ideas across the continent. In 1815, leaders met at the Congress of Vienna. They tried to bring back the old system of kings. They ignored the idea of nationality to keep royal power. 
By 1848, many revolutions broke out across Europe. These were caused by hunger and money problems. People were demanding political change. In Italy, a man named Giuseppe Mazzini encouraged people to fight for a nation. 
These ideas eventually moved beyond the borders of Europe. The concept of the nation-state spread to Africa and Asia. People there used these ideas to fight for their own independence. 
Nationalism is a powerful political ideology that reshaped the map of Europe. It is the belief that people should identify with their specific national group. These groups seek to create a nation-state to protect their unique interests. 
The mechanism of nationalism often involves uniting people through shared culture or language. Some nations formed by joining many small, regional states into one large country. Germany and Italy are major examples of this process. Other groups achieved statehood by rising up against large, existing empires. For instance, Greece, Serbia, and Bulgaria fought to leave the Ottoman Empire. Romania followed a unique path by uniting the principalities of Moldavia and Wallachia in 1859. It eventually gained full independence from the Ottoman Empire in 1878.
Many historical events provided the spark for these changes. The French Revolution initiated the movement toward modern nation-states. Later, the Napoleonic Wars spread these ideas across the continent. Napoleon used the Napoleonic Code to transform political systems. His armies carried slogans like "liberty, equality, brotherhood." These ideas of liberalism and national self-determinism changed how people viewed authority. The German philosopher G. W. Friedrich Hegel was a key thinker for the modern idea of the nation-state.
After the Napoleonic Wars ended in 1815, European leaders tried to stop these changes. They met at the Congress of Vienna to restore the old dynastic system. This system focused on "legitimism," which supported traditional royal authority. The leaders ignored the principle of nationality entirely. This caused tension because many people remained loyal to their local cities or provinces. In Austria, the Carlsbad Decrees of 1819 were used to repress nationalist movements. This pushed many political radicals and intellectuals underground.
The year 1848 was a major turning point for the movement. Severe famine and economic crises caused revolutions to break out across Europe. These uprisings were driven by a popular demand for political change. 
In the late 19th century, nationalism became more organized and complex. Leaders like Cavour and Bismarck worked with liberal modernizers to create new states in Italy and Germany. In the Habsburg monarchy, a compromise in 1867 created the Dual Monarchy with the Hungarians. 
Nationalism also grew in response to social changes and discrimination. As mass politics rose, some groups developed more exclusive forms of nationalism. In the Habsburg monarchy, even groups that held power, like the Germans and Magyars, embraced these ideas. On the edges of Europe, independence campaigns became even more intense. Norway finally won independence from Sweden in 1905. However, in Poland, the situation was different. Instead of gaining autonomy, Poland lost its independence to Russia in 1831. By 1867, it had become a Russian province.
These ideas eventually moved beyond the borders of Europe. The concept of the nation-state was exported to Africa and Asia. Anti-colonial intellectuals used these ideas to fight for independence from European empires. 
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