id	author	title	date	pages	extension	mime	words	sentences	flesch	summary	cache	txt
en-wikipedia-org-7592		In-group favoritism - Wikipedia			.html	text/html	6016	623	60	According to social identity theory, one of the key determinants of group biases is the need to improve self-esteem. This phenomenon was pioneered and studied most extensively by Henri Tajfel, a British social psychologist who looked at the psychological root of in-group/out-group bias. In a meta-analysis and review of the effect of oxytocin on social behavior done by Carsten De Dreu, the research reviewed shows that oxytocin enables the development of trust, specifically towards individuals with similar characteristics—categorized as 'in-group' members—promoting cooperation with and favoritism towards such individuals.[13] This bias of oxytocin-induced goodwill towards those with features and characteristics perceived to be similar may have evolved as a biological basis for sustaining in-group cooperation and protection, fitting with the Darwinian insight that acts of self-sacrifice and cooperation contribute to the functioning of the group and hence improve the odds of survival for members of said group.[13]	./cache/en-wikipedia-org-7592.html	./txt/en-wikipedia-org-7592.txt