Luckmann’s contribution to the sociology of knowledge and communication is based on his careful analysis of the link between socio-cultural linguistic practices, and the construction of social reality. Based on his empirical research of conversational analysis, Luckmann explains his theory of “communicative genres” in which linguistic types, such as, gossip, proverbs, or jokes, all serve as forms of social knowledge, and act as tools for the formation of social structure. His ethnography of speaking, modeled a social interactional code that gave a dissimilar approach to sources of social constraint.