This first chapter is a general introduction to the research on the field and the book. First, I introduce the proposals that will be the foundation for the analysis pursued in this book, and start this chapter with a description of the fundamental notions proposed in the minimalist framework to establish the general framework that will be used in the rest of the book. After that, the chapter focuses on some of the core notions of my analysis: the locality and anti-locality conditions on movement. Therefore, this chapter details the proposals that will be the basis for the analysis of this book, since one of the main goals of the book is to show that proposals such as anti-locality can be carried over to the analysis of the nominal expressions in Spanish. Finally, the chapter ends with an outline of the main contents of the book, where I briefly explain the issues I will be dealing with in Chapter 2, Chapter 3, Chapter 4, Chapter 5, and Chapter 6 and advance some of the solutions I will be providing.