linguistic:paraphrasing, information:extraction
Role of ideas

Despite forceful and often violent efforts of established and reactionary powers to keep them down, disruptive ideas gained popularity: democracy, liberalism, radicalism, nationalism, and socialism. They demanded a constitution, universal manhood suffrage, press freedom, freedom of expression and other democratic rights, the establishment of civilian militia, liberation of peasants, liberalization of the economy, abolition of tariff barriers and the abolition of monarchical power structures in favour of the establishment of republican states, or at least the restriction of the prince power in the form of constitutional monarchies.

In the language of the 1840s, 'democracy' meant replacing an electorate of property-owners with universal male suffrage. 'Liberalism' fundamentally meant consent of the governed, restriction of church and state power, republican government, freedom of the press and the individual. The 1840s had seen the emergence of radical liberal publications such as Rheinische Zeitung (1842); Le National and La Réforme (1843) in France; Ignaz Kuranda 's Grenzboten (1841) in Austria; Lajos Kossuth 's Pesti Hírlap (1841) in Hungary, as well as the increased popularity of the older Morgenbladet in Norway and the Aftonbladet in Sweden.

'Nationalism' believed in uniting people bound by (some mix of) common languages, culture, religion, shared history, and of course immediate geography; there were also irredentist movements. Nationalism had developed a broader appeal during the pre-1848 period, as seen in the František Palacký 's 1836 History of the Czech Nation, which emphasised a national lineage of conflict with the Germans, or the popular patriotic Liederkranz (song-circles) that were held across Germany: patriotic and belligerent songs about Schleswig had dominated the Würzburg national song festival in 1845.

'Socialism' in the 1840s was a term without a consensus definition, meaning different things to different people, but was typically used within a context of more power for workers in a system based on worker ownership of the means of production.

These concepts together—democracy, liberalism, nationalism and socialism, in the sense described above—came to be encapsulated in the political term radicalism.