The apostrophe indicates that the dilemma belongs to "Blacks." If it were only ONE black, then "Black's" would be correct. Since it belongs to blacks - plural - the correct placement of the apostrophe is after the "s," thus indicating that all of them have a dilemma and not just one of them.
End of grammar lesson..... :)
Bravo! I for one love the grammar and spelling police!
It’s comforting to see individuals with such in depth perspectives who find the most pressing issues in life are punctuation and spelling.