Pinker, Steven, <br/><br/>
The better angels of our nature :  why violence has declined / 
Steven Pinker. 
 - London :  Allen Lane,  2011. 
 - xxviii, 802 p. : 
<br/><br/><label>ISBN: </label>9781846140938 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Violence
<br/><br/><label>Dewey Class. No.: </label>303.609  / Be