The Ethnological Society of London (ESL) was a learned society founded in 1843 as an offshoot of the Aborigines' Protection Society (APS). The meaning of ethnology as a discipline was not then fixed: approaches and attitudes to it changed over its lifetime, with the rise of a more scientific approach to human diversity. Over three decades the ESL had a chequered existence, with periods of low activity and a major schism contributing to a patchy continuity of its meetings and publications. It provided a forum for discussion of what would now be classed as pioneering scientific anthropology from the changing perspectives of the period, though also with wider geographical, archaeological and linguistic interests.