In recent years, Searle's main interlocutor on issues of social ontology has been Tony Lawson. Although their accounts of social reality are similar, there are important differences. Lawson places emphasis on the notion of social totality whereas Searle prefers to refer to institutional facts. Furthermore, Searle believes that emergence implies causal reduction whereas Lawson argues that social totalities cannot be completely explained by the causal powers of their components. Searle also places language at the foundation of the construction of social reality while Lawson believes that community formation necessarily precedes the development of language and therefore there must be the possibility for non-linguistic social structure formation. The debate is ongoing and takes place additionally through regular meetings of the Centre for Social Ontology at the University of California, Berkeley and the Cambridge Social Ontology Group at the University of Cambridge.