1860 A. Gurowski i. 7 The origin of the denomination Chamites and Cushites has long been the subject of numerous ethnological researches, while comparative philology, which has proved itself so potent in the solution of innumerable race-problems has also been interrogated.
1890 A. W. Tourgée xi. 141 If every one could do as much, the race-problem would soon be solved.
2007 (Nexis) 14 Jan. a1 The race problems that came to light after Hurricane Katrina subsided with the waters.