National liberalism had its breakthrough in Denmark in the 1830s during a movement that wanted to change society. In 1849, the National liberals led by D.G. Monrad introduced a new constitution which secured democracy in the state of Denmark. | National liberalism had its breakthrough in Denmark in the 1830s during a movement that wanted to change society. In 1849, the National liberals led by D.G. Monrad introduced a new constitution which secured democracy in the state of Denmark. |