The several diverse definitions of empathy are sequentially presented and examined in Chapter 1, in an effort to begin this book with a shared understanding of the major historical and contemporary meanings of the construct. The Editors conclude this initial chapter by subscribing themselves to a particular components definition of empathy, a definition they predict will prove particularly useful in enhancing future understanding, investigation, and application of empathic behaviour. This components definition, therefore, substantially influences and shapes much of the content of the rest of the book.