A few flaws in his reasoning.
1. Truman moved towards desegregation because with the rise of the Soviet Union to great power status and the decline of the European empires, Jim Crow was a tremendous Cold War propaganda embarassment for the US. The US could not bid for hearts and minds in the Third World from a vantage point of legal white supremacism.
2. The light industrial jobs with which the Irish and Italians and Jews were able to climb out of the ghettoes were destroyed by globalization just as Blacks were about to use them. The Black working class was reduced to the underclass because the American economy no longer needed it.
"The Black working class was reduced to the underclass because the American economy no longer needed it."
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Thanks for your synopsis. It is a very deep subject, but tracing the effects of immigration on the American government, culture, and economy can take many different forms.
Curious - what "impact" would you say the current flood of illegal alien labor is having on the Black working class of 2005?