Free and unequal : the biological basis of individual liberty. by Roger J. Williams. Williams, Roger J. (Roger John), 1893-1988. Human genetics. Difference (Psychology) Variation (Biology) QH431 .W49 612.015 WIF Includes bibliographical references and index. Austin : Univ. of Texas Press , c1953. c1953. 1953 Text xiii, 177 p. : eng