On what grounds did white South Africans justify/rationalize separating black ethnic groups?

d. hip hop

it was originated in the 70s while the harlem renaissance occured in the 1920s

the  seven  days  battles  were  a series of seven battles over seven  days from june 25 to july 1, 1862, near richmond, virginia,  during  the american civil war. the  seven  days ended with mcclellan's army in relative safety next to the james river, having suffered almost 16,000 casualtiesduring  the retreat.

state law

most seat belt laws in the united states are left to the states. however, the first seat belt law was a federal law.