I have never been a good political animal. At university, where ideology dominated most debate, I found myself perpetually wrong-footed – not because I lacked opinions, but because I kept noticing things that complicated them. This week on the water Let me give you just one example of what I mean. We – that is, everyone on the left – knew that apartheid was an evil system, imposed by racists who believed that their social engineering would meet all the challenges of a diverse and multi-racial...