Abstract
This chapter discusses the life and ethical philosophy of Henry Sidgwick. His masterpiece, The Methods of Ethics, first published in 1874, marks the culmination of the classical and nontheological utilitarian tradition, which took ‘the greatest happiness’ as the fundamental normative demand. Sidgwick was also a reformer who always advocated education as the crucial issue for historical progress, in ethics, economics, politics, and other areas. His practical ethics, often only indirectly utilitarian, involved finding common ground despite foundational ethical differences, and that common ground was the cultivation of humanity.