<P>Derek Parfit (1942-2017) is widely considered to be one of the most important moral philosophers of the twentieth century. <I>Reasons and Persons</I> is arguably the most influential of the two books published in his lifetime and hailed as a classic work of ethics and personal identity. </P><P><EM>Derek Parfit''s </EM>Reasons and Persons<EM>: An Introduction and Critical Inquiry</EM> is an outstanding introduction to and assessment of Parfit''s book, with chapters by leading scholars of ethics, metaphysics and of Parfit''s work.</P><P></P><P>Part I provides a much-needed introduction to key topics and themes in<I> Reasons and Persons</I> that will be useful for those new to Parfit''s complex work. These include Parfit''s idea of self-defeating theories, rationality and time, personal identity, future generations and well-being.</P><P></P><P>Part II explores various debates generated by <I>Reasons and Persons</I>, including its connections with Buddhism, metaethics, theory of rationa