R&B is never going to be dead, it's just going to evolve.
He knew a lot about his grandparents - and perhaps he feels he's been endowed with abilities to go into people's heads who are long dead - but, to a certain extent, he's making it up.
I think Sacajawea was caught in a series of tragic situations - her kidnapping as a child, her being passed from tribe to tribe, being sold into marriage. However, I never thought of her as a tragic figure. I do not think she was a victim in the way we think of tragic figures.
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