Complex sentence: In 2000 Macneil renamed his theory "essential contract theory" in order to distinguish it from other possible versions of relational contract "Worlds and Essential Contract Theory" (2000) 9 Social & Legal Studies 431.
Split into simpler sentences: In 2000 Macneil renamed his theory "essential contract theory" in order to distinguish it from other possible versions of relational contract theory. "Contracting Worlds and Essential Contract Theory" (2000) 9 Social & Legal Studies 431.