The term emphasizes that humans must be seen as a part of, not apart from, nature — that the delineation between social and ecological systems is artificial and arbitrary. Scholars have also used concepts like ‘coupled human-environment systems’, ‘ecosocial systems’ and ‘socioecological systems’ to illustrate the interplay between social and ecological systems. The term social-ecological system was coined by Fikret Berkes and SRC’s research director Carl Folke in 1998 because they did not want to treat either the social or ecological dimension as a prefix, but rather give the two same weight during their analysis.