According to Britain’s leading academic on handedness, lefties, or southpaws, appear to have the edge when it comes to music and mathematics, but there is no hard statistical evidence to suggest that they are favoured in other spheres, such as politics. He calls left-handers the “last neglected minority”; thinks it is scandalous that dangerous machinery is built almost entirely for right-handers; and recently wrote in the British Medical Journal that left-handed surgeons get a raw deal. McManus believes that numeracy, musicality and left-handedness could all somehow be part of the same neurological package, and it’s down to the way in which the human brain divides its duties between the hemispheres. McManus believes that the genes emerged during the course of human evolution, and stayed in the gene pool because they conferred a survival advantage, although what that advantage was remains unclear. The reason why most of the world drives on the wrong side of the road. Napoleon overturned the historic practice of travelling on the left with weapons in the right hand when he ordered his armies to the other side to suit his left-handedness.

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