In the Spring of 1848 waves of liberal revolts roll over the Europe (the Springtime of Peoples). The insurgents demand more (guarantees for) freedoms and liberties cemented in new and liberal constitutions. And most of them want a parliament (parliamentary system) as well, with democratically chosen representatives at the helm instead of non-elected, autocratic leaders who are not politically answerable to anyone, lest to a parliament. Many of the authoritarian governments of the day initially give in to the demands of the people: a new fourth generation of liberal constitutions sweeps over the European continent (much of which are rolled back after a short while). This constitutional wave also ushers an era of new nations and the rise of nationalism.