Principles and Parameters is a new textbook intended for the advanced undergraduate or postgraduate student of linguistics. In this readable and authoritative survey of the theory, incorporating much of Government and Binding (GB) theory, Peter Culicover summarizes the major proposals and results of Case theory, Theta theory, X'-theory, Binding theory, the theory of A- and A'- movement, locality conditions, and the theory of Logical Form (LF). He provides an up-to-date introduction to a number of more recent proposals, including Chomsky's Minimalist Program, Larsonian shells, and Kayne's Antisymmetry theory.