who said anything about the people within the category defining it?
I did. A person's characterizations or perceptions of black people are that person's perceptions, not things that are inherent to black people. The category "black people" was created, specifically by "white people." That distinction was not a neutral categorization. It was the rationalization for oppression and exploitation, first, and disenfranchisement (to the extent that an Amendment to the Constitution was needed). You'd have to agree that all the segregation laws gave an unequal advantage to one category over another. At least, the Supreme Court agreed and declared "separate but equal" a fallacy and un-Constitutional.
The category that most black Americans have desired is that of "American" citizen. At least, if we take Bill Cosby seriously, that has been the desire of blacks in America for the majority of its history. In fact, that is the loss --the desire to be good citizens-- that he laments now. Hmmm.
Anyway, to answer your general question, I'd refer you to that old saying about what would happen if the "lion wrote history" (i.e., instead of the hunter).
Does the perception of a given category mean that the category exists? As a philosopher, I would say no.
sure it exists. it exists as a perception of a category and a predisposition to behave a certain way toward perceived members of that category.
Right. White people (scientists, maybe starting with Blumenbach, then Linnaeus, then Comte de Gobineau] have all come up with great racial theories. They created Caucasians, homo sapiens europiensis, and Jim Crow. They are the product of a particular imagination, at least the ideas about them. To that extent they are real. However, they are as valid as the categorizations of the Papuan natives of you. So, all I'm saying is that you should not expect "me" to accept your perceptions of the "myself." That might be suicide, for I would probably learn that I was defective or inferior in some way. I doubt that I would learn that I was superior, when even equality has been elusive --in the perceptions of some.
As Colin Powell would say, "Race is your problem, not mine."
the general category is neither the product nor the result of how the members of the category speak, look, or dress.
sure it is... the category is defined over a single property that all members of the extension share - wearing a hat.
Okay, all Caucasians are not white; all Negroes are not African American, or black; therefore .... what they have in common is their categorization. QED.
and that's exactly what i was talking about when i said that "the category" surely had some causal role in socio-economic disparities.
No, the "categorization" can play a causal role in social conditions. I wouldn't say "disparities" without being specific. What special ability do you share with other white people, let alone "all" white people?
(many) white people treat black people in a certain way, based on a categorical belief. (many) black people treat white people in a certain way, based on a categorical belief about white people's categorical beliefs. and vice versa, in all possibly recursed permutations. that's what i meant by a "relational category"
Yeah, but have you ever seen Dave Chappelle's skit about the blind (black) KKK guy? Anyway, yes, if one grows up in this society treated like a black person (i.e., confronted with the perceptions of others who do not want to recognize individuality), then it becomes natural to generalize about all white people (?). If the majority of white people believe stupid shit about black people (and yellow, brown, red and mixed people), then the natural tendency is to believe certain things about white people. My point is that this tendency to lump people together is something we can recognize and overcome. However, it is also natural for humans not to want to recognize it, especially when it comes to exploitation --and that brings us back full circle.
Let me point this last thing out. Africans and many West Indians do way better on standardized tests in the US than white Americans. If it were the category that caused the educational and social problems, this could not be the case. Yet, no matter how many phd's, mds, jds, general, etc., etc., it is always easier to point at rappers and teenage mothers as examples. It's all a diversion, and quite unnecessary. People want everybody to forget about race, but don't forget that it exists --cause it explains a lot.
"A man is rich when he has time and freewill. How he chooses to invest both will determine the return on his investment."