began with the Gülhane Hatt-ı Şerif in 1839 and ended with the First Constitutional Era in 1876. Namik Kemal, a political activist and member of the Young Ottomans, drew on major Enlightenment thinkers and "a variety of intellectual resources in his quest for social and political reform." In 1893, Kemal responded to Ernest Renan, who had indicted the Islamic religion, with his own version of the Enlightenment, which "was not a poor copy of French debates in the eighteenth century, but an original position responding to the exigencies of Ottoman society in the late nineteenth century." Historiography The Enlightenment has always been contested territory. According to Keith Thomas, its supporters "hail it as the source of everything that is progressive about the modern world. For them, it stands for freedom of thought, rational inquiry, critical thinking, religious tolerance, political liberty, scientific achievement, the pursuit of happiness, and hope for the future." Thomas adds that its detractors accuse it of shallow rationalism, naïve optimism, unrealistic universalism, and moral darkness. From the start, conservative and clerical defenders of traditional religion attacked materialism and skepticism as evil forces that encouraged immorality. By 1794, they pointed to the Reign of Terror during the French Revolution as confirmation of their predictions. As the Enlightenment was ending, Romantic philosophers argued that excessive dependence on reason was a mistake perpetuated by the Enlightenment because it disregarded the bonds of history, myth, faith, and tradition that were necessary to hold society together. Ritchie Robertson portrays it as a grand intellectual and political program, offering a "science" of society modeled on the powerful physical laws of Newton. "Social science" was seen as the instrument of human improvement. It would expose truth and expand human happiness. Definition The term "Enlightenment" emerged in English in the latter part of the 19th century, with particular reference to French philosophy, as the equivalent of the French term Lumières (used first by Jean-Baptiste Dubos in 1733 and already well established by 1751). From Kant's 1784 essay "Beantwortung der Frage: Was ist Aufklärung?" ("Answering the Question: What is Enlightenment?"), the German term became Aufklärung (aufklären=to illuminate; sich aufklären=to clear up). However, scholars have never agreed on a definition of the Enlightenment or on its chronological or geographical extent. Terms like les Lumières (French), illuminismo (Italian), ilustración (Spanish) and Aufklärung (German) referred to partly overlapping movements. Not until the late 19th century did English scholars agree