The German materialist and atheist anthropologist Ludwig Feuerbach would signal a new turn in materialism through his book, The Essence of Christianity (1841), which provided a humanist account of religion as the outward projection of man's inward nature. Feuerbach's materialism would later heavily influence Karl Marx.

Answer this question, if possible (if impossible, reply "unanswerable"): When did Karl Marx write The Essence of Christianity?
unanswerable