The classic work that redefined the sociology of knowledge and has inspired a generation of philosophers and thinkers In this seminal book, Peter L. Berger and Thomas Luckmann examine how knowledge forms and how it is preserved and altered within a society. Unlike earlier theorists and philosophers, Berger and Luckmann go beyond intellectual history and focus on commonsense, everyday knowledge-the proverbs, morals, values, and beliefs shared among ordinary people. When first published in 1966, t