I found the Stanford Encyclopedia of Philosophy while looking for a good link to define Identity Politics for when I yelled at Fineman downpage. I chose not to link the encyclopedia page on the topic because I found a better link specific to identity politics for white guys, but Stanford's description is too good not to share.

Identity politics

The laden phrase "identity politics" has come to signify a wide range of political activity and theorizing founded in the shared experiences of injustice of members of certain social groups. Rather than organizing solely around ideology or party affiliation, identity politics typically concerns the liberation of a specific constituency marginalized within its larger context. Members of that constituency assert or reclaim ways of understanding their distinctiveness that challenge dominant oppressive characterizations, with the goal of greater self-determination.

The major sections in the article are:

History and Scope
Philosophy and Identity
Liberalism and Identity Politics
Gender and Feminism
From Gay and Lesbian to Queer
Disability
Race, Ethnicity, and Multiculturalism
Other Challenges to Identity Politics
Identity Politics in the 21st Century