The world’s most valuable mining company is reversing the diversification it put in place only 13 years ago under South African Brian Gilbertson and American Paul Anderson and being split in two under Scot Andrew Mackenzie. Four giant commodity groups will make up the new BHP Billiton and seven commodity groups the new standalone Newco. The big piece will become factory-like and the small piece remain mine-like and having to replenish depleting resources and hunt down new opportunities. The shareholders will have the benefit of both worlds.