The central concept of Berger and Luckmann’s Social Construction of Reality was that actors interacting together form, over time, typifications or mental representations of each other’s actions, and that these typifications eventually become habitualized into reciprocal roles played by the actors in relation to each other. When these reciprocal roles become routinized, the typified reciprocal interactions are said to be institutionalized. In the process of this institutionalization, meaning is embedded and institutionalized into individuals and society – knowledge and people’s conception of (and therefore belief regarding) what reality ‘is’ becomes embedded into the institutional fabric and structure of society, and social reality is therefore said to be socially constructed.