Politics in 19th-century Hungary substantially driven by the "Ideology of '47, '48, '49 and '67",[citation needed] which refer to a set of different normative beliefs that were prevalent in the country in the second half of the 19th century. The political spectrum and the society changed dramatically during that time, especially through decisive events such as the Hungarian Revolution of 1848 or the Ausgleich in 1867.[citation needed] Many scholars[who?] have argued that this had a transformative effect not only on the legal and governmental systems of the time, but also on the legal claims of different social groups which resulted in the formation of a new political landscape after both major historical events.[citation needed]