In an early and important article, which she published as Sarah Waterlow, the late Sarah Broadie (1941-2021) wrote: “our concern is less with what Plato the individual may himself have meant, than with what his theory means.” A characteristically resolute and praiseworthy determination to pursue the practical implications of the Idea of the Good in Plato’s Republic—to explain its meaning in practice—continues to distinguish Broadie’s last book almost fifty years later. The fact that it is, by a tragic necessity, her last book, may be strictly speaking irrelevant to a critical examination of its contents but no restriction of this kind will be applied here. So strong is the amiable impression made by the author’s seriousness of purpose, and so impressive is this culminating effort to come to grips with Plato, that an attempt to avoid the memorial element would be misplaced. Since Sarah Broadie is no longer with us, we can profitably turn to this bold and elegant last word as a way of keeping her spirit alive, allowing the benign force of her scholarly persona to live on as an inspiration to our own practice as students of ancient philosophy quite apart from any theoretical objections one might have with respect to what Plato himself may have meant by the Idea of the Good. If the purpose of a good review is to encourage others to read the book being reviewed, this one will rather attempt to continue the dialogue that this book initiates, and it is addressed primarily to those who will have read Broadie’s last book, for every student currently studying Plato’s Republic will need to read it.