[The authors]... do something new and worthwhile. They present Sidgwicks most important ideas in an admirably clear and accessible way...And they do a fine job of illuminating connections between ideas discussed by Sidgwick and related ideas in contemporary moral philosophy.
David Phillips, Mind
de Lazari-Radek and Singer succeed in explaining Sidgwick's views in a clear and engaging way . . . this book nicely explains many brilliant ideas that Sidgwick had.
Jussi Suikkanen, The Philosophers Magazine
This book might well represent the most significant statement and defense of act utilitarianism since the 19th century, when the classical utilitarianism of Bentham, Mill, and Sidgwick became the spirit of the age. Indeed, in many respects, it marks a crucial return to classical utilitarianism in its finest flowering . . . Restoring Sidgwick to his rightful place of philosophical honor and cogently defending his central positions are obviously no small tasks, but the authors are remarkably successful in pulling them off . . . their book is full of riches.
Bart Schultz, Notre Dame Philosophical Reviews