The author's own definition of love runs through the book: to love is to act intentionally, in sympathetic resonance to others (including God) to promote overall well-being. Love acts are influenced by previous actions and executed in the hope of attaining a high degree of goof for all. Themes include the role of love in major religions, divine love in action, war and nonviolence, the science of sex and love, and the position of animals in the scheme of things. His chapter on the fundamentals of love contains a useful analysis that feeds into his final reflections arguing that love can make progress in a number of ways to which we ourselves can contribute.