The new laws also seek to tighten existing legislation on affirmative action, decreeing that black South Africans must constitute at least 60% of senior management by 2017, up from 26% at present.
The so-called "blood-fraction" laws of 1705 ruled that anyone who was at least 1/8 black — which meant one black great grandparent — could not be labeled white.
If we live in a typical universe, then it ought to have physical laws and constants that optimise the production of black holes. It is not yet known whether our universe fits the bill.