The Ways and Power of Love was originally published in 1954 when Pitirim Sorokin was in the twilight of his career and leading the Harvard Research Center in Creative Altruism. His elaborate scientific analysis of love with regard to its higher and lower forms, its causes and effects, its human and cosmic significance, and its core features constitutes the first study on this topic in world literature to date. Sorokin was the one absolutely essential twentieth-century pioneer in the study of love at the interface of science and religion. Bringing The Ways and Power of Love back into print allows a new generation of readers to appreciate Sorokin's genius and to move forward with his endeavor at a time when civilization itself continues to be threatened by a marked inability to live up to the ideal of love for all humankind. It is certainly right to hope, with Sorokin, that progress in knowledge about love can move humanity forward to a better future. Turning the sciences toward the study of love is no easy task, but it can and must be done.