Sheets-Johnstone, Maxine. <br/><br/>
The roots of morality / 
Maxine Sheets-Johnstone. 
 - University Park :  Pennsylvania State University Press,  c2008. 
 - x, 454 p. ;  24 cm. 
<br/><br/>Includes bibliographical references (p. [412]-435) and indexes. 
<br/><br/><label>ISBN: </label>0271033924 (cloth : alk. paper) 9780271033921 (cloth : alk. paper) 
<br/><br/><label>Nat. Bib. No.: </label>GBA8C1830  bnb 
<br/><br/><label>Nat. Bib. Agency Control No.: </label>014783427  Uk 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ethics, Evolutionary.