Antonio Gramsci was an Italian communist philosopher who wrote extensively about cultural hegemony while imprisoned by Mussolini's fascist government in the 1920s-1930s. In his Prison Notebooks, published posthumously, Gramsci argued that the ruling class maintains power not just through economic means but also by promoting their worldview as common sense through cultural institutions. He believed constant struggle occurred in the cultural realm between different ideologies, and that political change could emerge during times of crisis when the authority of the dominant ideology is challenged.