What are the causes and effect …

The 1848 revolution of the liberals refers to the various national movements pioneered by educated middle classes alongside the revolts of the poor, unemployed and starving peasants and workers in Europe. While in countries like France, food shortages and widespread unemployment during 1848 led to popular uprisings, in other parts of Europe (such as Germany, Italy, Poland, and the Austro-Hungarian Empire), men and women of the liberal middle classes came together to voice their demands for the creation of nation-states based on parliamentary principles. The political, social and economic ideas supported by the liberals were:

•  Politically, they demanded constitutionalism with national unification, nation-state with a written constitution and parliamentary administration.
•  Socially, they wanted to rid society of its class-based partialities and birthrights. Serfdom and bonded labor had to be abolished.
•  Economically they demanded freedom of markets and right to property. The abolition of state-imposed restrictions on the movements of goods and capital.