However, in 1848, bad harvests occurred in Europe which contributed to civil unrest.<ref>[https://www.khanacademy.org/humanities/whp-1750/xcabef9ed3fc7da7b:unit-2-liberal-and-national-revolutions/xcabef9ed3fc7da7b:2-3-nationalism/a/read-the-world-revolution-of-1848-beta#:~:text=Like%20the%20Atlantic%20revolutions%2C%20the,against%20French%20soldiers%20in%20uniform. The World Revolution of 1848]</ref> In addition, the Revolutions of 1848 were caused by the dissemination and spread of ideas such as popular sovereignty (arguing for political liberalization of absolute monarchies) and socialism.<ref>[https://study.com/academy/lesson/revolutions-of-1848-the-spring-of-nations-major-revolutions-causes-collapse.html#:~:text=The%20Revolutions%20of%201848%20were,in%20Europe%20in%201845%2D48. Revolutions of 1848 & Spring of Nations | History, Cause & Impact], Study.com</ref> | However, in 1848, bad harvests occurred in Europe which contributed to civil unrest.<ref>[https://www.khanacademy.org/humanities/whp-1750/xcabef9ed3fc7da7b:unit-2-liberal-and-national-revolutions/xcabef9ed3fc7da7b:2-3-nationalism/a/read-the-world-revolution-of-1848-beta#:~:text=Like%20the%20Atlantic%20revolutions%2C%20the,against%20French%20soldiers%20in%20uniform. The World Revolution of 1848]</ref> In addition, the Revolutions of 1848 were caused by the dissemination and spread of ideas such as popular sovereignty (arguing for political liberalization of absolute monarchies) and socialism.<ref>[https://study.com/academy/lesson/revolutions-of-1848-the-spring-of-nations-major-revolutions-causes-collapse.html#:~:text=The%20Revolutions%20of%201848%20were,in%20Europe%20in%201845%2D48. Revolutions of 1848 & Spring of Nations | History, Cause & Impact], Study.com</ref> |