This doesn't say that slavery is right, just that it is inevitable (and hence trying to get rid of it is useless).
No. I think it's fair to say most of us believe death is inevitable. That's not at all the same as saying we shouldn't try to get rid of it.
You are arguing that there will always be an easily identifiable underclass, and in a pluralistic society the underclass will tend to be defined by race.
No. I'm saying that humans tend to draw distinctions between "us" and "them". I'm also saying that in a society with large disparity among classes -- such as ours today -- there will tend to be one most-disadvantaged group. Finally I'm saying that in these circumstances, obvious racial differences become an easy way to define who gets to play "most-disadvantaged" this generation.
First of all it is quite possible to define the group to which we belong as "all humans" or "all mammals" or some other inclusive category where the "other" is relatively unimportant.
Quite possible, and in my opinion totally contrary to the way social dynamics really work.
Secondly the definition of "us" and "them" does not necessarily lead to defining "them" as intrinsically horrible - consider sports teams for instance. Sure, a Yankees fan might tease a Red Sox fan, but you aren't going to find many Yankees fans who think that Red Sox fans are awful people because they root for the wrong team.
You're not much of a sports fan, are you? Go to Philadelphia some time when the Eagles are playing the Steelers, and wear a Steelers jersey to the game. Oh, make sure your insurance is up-to-date.
Third, the existence of an easily identifiable and identified ethnic underclass does not necessarily lead to that group being depressed into a long-lived underclass situation. For instance in US history the Irish, Italians, Greeks, and many other ethnic groups were once clearly disadvantaged, but then as groups worked their way out of it. (Only to turn on later waves of immigration...)
No. Turning on later waves of immigrants was
precisely how they worked their way out of it.
My biggest guess as to why is that many blacks feel that they are owed because of a long history of things that have been done to them. And my second biggest guess is that many blacks have no hope that things will improve.
While my gut feeling is that both these factors really do contribute, without some data to back it up this is uncomfortably close to saying, "It's all their own fault."
What I found interesting about the research is that when in country A you have 2 ethnic groups, one of which does fine and the other of which is perennially disadvantaged, if members of both emmigrate to country B, then in country B, both do equally well! Apparently changing external expectations about what you can and cannot do can break dynamics of persistent failure.
I'd like to see the specifics. I suspect any two ethnic groups from most countries would be seen in the U.S. as the same. i.e.: Arabs, Persians, Sikhs and frequently Indians are all commonly lumped together in the U.S.