The word sociology (or sociologie) is derived from the Latin: socius, "companion"; -ology, "the study of", and Greek λόγος, l?, "word", "knowledge". It was first coined in 1780 by the French essayist Emmanuel Joseph Sieyes (1748?1836) in an unpublished manuscript. Sociology was later developed by the philosopher, Auguste Comte (1798?1857), in 1838.