"The flower of that experiment of the 1940s was the Pioneer Corps. When this indispensable body of hewers and drawers was confined to men with IQs below the line required to get them into the Intelligence Corps, the rise in efficiency was spectacular. The morale of these dull-witted men was better. They were no longer daunted by having superior people to compete with. They were amongst equals – they had more equal opportunities since they had more limited ones – and they were happier, had fewer mental breakdowns, and were harder working. The Army had learnt the lesson of the schools: that people can be taught more easily, and get on better, when they are classed with people of more or less equal intelligence, or lack of it."