This volume presents a series of lectures given by P. F. Strawson to final-year undergraduates at the University of Wales, Bangor, in the autumn term of 1946. Strawson was appointed to a lectureship at Bangor immediately after his military service in World War Two; he held this post for only one year before returning to Oxford, to a teaching position at University College. He eventually became one of the leading figures in twentieth-century philosophy. The lectures survive in manuscript form in the Bodleian Library in Oxford, and have been prepared for publication by Jonathan Dancy. Lectures on Ethics, 1946 contains the germ of Strawson's developed thought on freedom, moral attitudes, and ethical ideals, with an unusual level of attention being paid to contemporary psychological research. Other topics covered include the contrast between consequentialist and other moral theories, the analysis of moral judgements, and the nature of moral obligation.