Chapter 1 Defining constructivism; Chapter 2 Constructivism and the sociology of scientific knowledge; Chapter 3 The varieties of dependence; Chapter 4 The varieties of constitutive constructivisms; Chapter 5 The empirical case for constructivism; Chapter 6 The a priori case for constructivism; Chapter 7 Three brief and inadequate objections to constructivism; Chapter 8 The problem of misrepresentation; Chapter 9 Constructive empiricism and social constructivism; Chapter 10 The infinite regress of constructions; Chapter 11 The Duhemian asymmetry; Chapter 12 The problem of the two societies; Chapter 13 Constructivism and time; Chapter 14 Constructivism and logic; Chapter 15 Relativism; Chapter 16 Semantic constructivism; Chapter 17 Irrationalism; Chapter 18 Conclusions; References; Index;