Prophecy is one of the simplest ways for an historian to destroy his credit and reputation. Having been persuaded to take this risk, I shall partly cover it with one small insurance policy: I shall set forth what seem to me to be the relevant facts, but not be too dogmatic about the conclusions to be drawn from them.

Where will South Africa stand twenty-five years from now? What will have happened during those years? In theory there are, I think, only four possibilities: (i) that the status quo will remain essentially unchanged; (ii) that radical changes, involving or at least leading to the abolition of all racial discrimination, will come about peacefully, by constitutional means; (iii) that the regime will be overthrown by invading foreign forces; and (iv) that it will be overthrown by revolution within the country, with or without foreign support. As there are strong reasons for believing that none of these alternatives is really possible, some factor seems to have been overlooked. Perhaps it will appear as the four alternatives are examined.