Indiana University-Purdue University Indianapolis (IUPUI) / This thesis examines a group of German intellectuals and politicians who, during World War I, formulated and proposed a democratic ideology based on their interpretation of the German Enlightenment philosopher Immanuel Kant and integrated his ideas with those of Karl Marx, the father of modern socialism. Their theory was an attempt to legitimize democracy in Germany at a time when democratic reforms came to the forefront of German politics. These thinkers advocated a non-revolutionary foundation for social democracy by emphasizing the role of human reason and agency in the process of democratization. Because they had abandoned the need for revolution, which most early nineteenth-century socialists believed was socialism’s ‘final goal,’ these thinkers were known as revisionists. The revisionists’ primary medium through which they espoused their views of social democracy was the journal Sozialistische Monatshefte, which ran from 1893 until 1933. The timeframe on which this argument focuses is the last two years of World War I, when Germany’s failure achieve a victor’s peace opened new avenues for the center-left of the political spectrum to achieve democratic reform. The revisionists sought to carry forward the process of democratization, and by doing so, reconnected with the ideas of the Enlightenment.