1712-1778 1724-1804 1770-1831 1775-1854 18thcentury 19thcentury christianity churchhistory friedrichwilhelmjosephvon georgwilhelmfriedrich hegel history historyofdoctrinesjesuschrist immanuel jean-jacques kant philosophy rousseau schelling viewsonchristianityhegel viewsonchristianitykant viewsonchristianityrousseau