Ridley, Matt <br/><br/>
The origins of virtue : human instincts and the evolution of cooperation 
Matt Ridley 
 - 1st American ed 
 - New York  Viking  1997 
 - viii, 295 p. ; 24 cm 
<br/><br/> Includes bibliographical references (p. [267]-284) and index 
<br/><br/><label>ISBN: </label>9780140244045 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Altruism<br/>Ethics, Evolutionary<br/>Evolution (Biology)
<br/><br/><label>Dewey Class. No.: </label>304.5 RID