Read this: The Enlightenment – known in French as the Siècle des Lumières, the Century of Enlightenment, and in German as the Aufklärung – was a philosophical movement which dominated the world of ideas in Europe in the 18th century. The Enlightenment included a range of ideas centered on reason as the primary source of authority and legitimacy, and came to advance ideals such as liberty, progress, tolerance, fraternity, constitutional government and ending the abuses of the church and state. In France, the central doctrines of the Lumières were individual liberty and religious tolerance, in opposition to the principle of absolute monarchy and the fixed dogmas of the Roman Catholic Church. The Enlightenment was marked by increasing empiricism, scientific rigor, and reductionism, along with increased questioning of religious orthodoxy.
Now answer this question, if there is an answer (If it cannot be answered, return "unanswerable"): The principle of absolute monarchy of which group was at odds with those following the Enlightenment?
Roman Catholic Church