>I don't think it's as accepted of a theory or as widely
>discussed.
>It's not certainly a 'hot' topic amongst progressive discourse
>like gender
>identity is.

a simple Google search turned up these results on page one:

http://aida.wss.yale.edu/~nq3/NANCYS_Yale_Website/resources/papers/NixQian_20150101.pdf

http://www.mixedracestudies.org/wordpress/?p=39195

http://paa2013.princeton.edu/papers/131929

http://face2face.si.edu/my_weblog/2012/07/jean-toomer-the-fluidity-of-racial-identity.html

http://www.researchgate.net/publication/222039063_Opting_for_White_choice_fluidity_and_racial_identity_construction_in_post_civil-rights_America

>Can you point me to a popular show (like All In) where people
>are
>discussing fluidity as it pertains to race identity?

http://www.npr.org/2013/11/11/242357164/seeing-opportunity-in-a-question-where-are-you-really-from