In the decades since Berger and Luckmann’s famous treatise, the paradigm of social constructionism has exploded into a veritable theoretical industry. In this very smart and useful book, the philosopher Ian Hacking tells us that to sort out what social construction actually means as a theoretical paradigm, we need to think more critically about what exactly, people are arguing is being constructed. A critical but even-handed guide to social constructionism as it is used today.