Spread of Revolutionary Ideas in European States after 1815
After 1815, revolutionaries in Europe used various methods to spread their ideas and gain support for their cause. Some of the key ways they spread their ideas include:

1. Political Clubs and Societies
Revolutionaries formed political clubs and societies to discuss and promote their ideas. For example, the Carbonari in Italy and the Burschenschaften in Germany were secret societies that advocated for political change and independence.

2. Newspapers and Pamphlets
Revolutionaries published newspapers and pamphlets to disseminate their ideas to a wider audience. These publications often criticized the existing political order and called for reform. For instance, the Decembrists in Russia used pamphlets to promote liberal ideas and opposition to the tsar.

3. Public Demonstrations and Protests
Revolutionaries organized public demonstrations and protests to raise awareness about their cause. These events often attracted large crowds and garnered public attention. The July Revolution in France in 1830, for example, was sparked by popular protests against the monarchy.

4. Exile and Networking
Many revolutionaries were forced into exile due to their political activities. While in exile, they continued to spread their ideas and build networks with like-minded individuals. Giuseppe Mazzini, an Italian nationalist, lived in exile in London and established the 'Young Italy' movement to promote Italian unification.

5. Art and Culture
Revolutionary ideas were also spread through art and culture. Artists, writers, and musicians used their work to criticize the existing social order and advocate for political change. The Romantic movement, for instance, emphasized the importance of individual freedom and national identity.
Overall, revolutionaries in European states after 1815 employed a variety of tactics to spread their ideas and mobilize support for their cause, ultimately contributing to the wave of revolutions that swept across Europe in the 19th century.