Introduction / A. Montagu -- Valerio speaks of love / G. Chapman -- A scientist looks at love / A. Montagu -- The nature of love / H.F. Harlow -- The biology of love and interest, etc. / I.D. Suttie -- The sources of love and fear / M. Bevan-Brown -- The need for love / B. Chisholm -- The riddle of the sphinx / W. La Barre -- Love and self-love / P. Symonds -- Love in healthy people / A.H. Maslow -- A preface to love / R. May -- The theoretical importance of love / W.J. Goode -- Romantic love / H.G. Beigel -- The direction of human development / A. Montagu -- On love / St. Paul.