The Age of Liberty (Swedish: Frihetstiden) is the half century long experiment with a parliamentary system and increasing civil rights in the period from Charles XII's death in 1718 to Gustav III's coup d'état in 1772. The shift of power from the Monarch to the Parliament was a direct effect of the disastrous Great Northern War.
When using the term Parliamentarianism it must, however, be noted that 18th century Sweden was in no way a democracy as known to the 20th century. Although the taxed peasantry was represented in the Parliament, their influence was disproportionately small while commoners without taxed property had no suffrage at all.