Spinoza's Ethics is one of the most fascinating and systematic works of European philosophy--but also among the most challenging. Due to both the metaphysical complexities and the unusual structuring of the Ethics, many readers struggle to access and thereby appreciate the significance of Spinoza's thought. This unique edition offers not only a clear and modernized translation but also extensive explanatory commentary from the book's editors, interspersed throughout the text. This commentary is designed neither to distract from Spinoza's writing nor to argue for a contested interpretation. Rather, it provides explanation, elaboration, and context to assist readers in understanding the arguments and concepts at play. This edition offers a broad point of access into one of the most important but frequently misunderstood figures of early modern philosophy.