The two societies co-existed warily for several years. The X Club, with members in common, supported the Ethnological Society's side of the debate. Both societies took an interest in sexual morality as a topic, but the attitude of social evolutionism was very largely restricted to the Ethnological Society, where John Ferguson McLennan was a member, with the exception of Charles Staniland Wake who made little impact at the time. Huxley made efforts to merge the societies in 1866, but was blocked by Crawfurd; the attempt was renewed in 1868 after Crawfurd's death. The Ethnological Society and Anthropological Society merged in 1871 into the Anthropological Institute. A small group of past supporters of Hunt broke away in 1873, forming a London Anthropological Society that lasted two years.