Book excerpt: We often make judgments about good and bad, right and wrong. Philosophical ethics is the critical examination of these and other concepts central to how we evaluate our own and each others' behavior and choices. This text examines some of the main threads of discussion on these topics that have developed over the last couple of millenia, mostly within the Western cultural tradition.The book is designed to be used alone or alongside a reader of historical and contemporary original sources, and is freely available in web and digital formats at https: //press.rebus.community/intro-to-phil-ethics/. If you are adopting or adapting this book for a course, please let us know on our adoption form for the Introduction to Philosophy open textbook series: https: //docs.google.com/forms/d/e/1FAIpQLSdwf2E7bRGvWefjhNZ07kgpgnNFxVxxp-iidPE5gfDBQNGBGg/viewform?usp=sf_link. Cover art by Heather Salazar; cover design by Jonathan Lashley. One of nine books in the Introduction to Philosophy open textbook serie