(a) During the years following 1815, the conservative regimes began curbing activities that questioned the legitimacy of the autocratic governments in Europe. (b) Criticism and dissent was not tolerated(c) Censorship was imposed to control the spread of the ideas like liberty and freedom. (d) Freedom of expression was curbed as thinkers were not allowed to raise their views. (e) The liberal nationalists, inspired by French Revolution, began to carry their opposition secretly and formed secret societies to spread the ideas of nationalism and train the revolutionaries.