00480pamaa2200157 4500 0000017240 20060427090000.0 0226044831 170 BEY BJ1012 BEY BEYLEVELD The dialectical necessity of morality : an analysis and defense of Alan Gewirth's consistency Deryck Beyleveld. Chicago: The University of Chicago Press, 1991. xxxv, 503p.: 23cm. Gewirth, Alan Ethics