The most interesting finding is that students majoring in liberal-arts fields—sciences, social sciences, and arts and humanities—do better on the C.L.A., and show greater improvement, than students majoring in non-liberal-arts fields such as business, education and social work, communications, engineering and computer science, and health. There are a number of explanations. Liberal-arts students are more likely to take courses with substantial amounts of reading and writing; they are more likely to attend selective colleges, and institutional selectivity correlates positively with learning; and they are better prepared academically for college, which makes them more likely to improve. The students who score the lowest and improve the least are the business majors.

Sixty per cent of American college students are not liberal-arts majors, though. The No. 1 major in America is, in fact, business. Twenty-two per cent of bachelor’s degrees are awarded in that field. Ten per cent are awarded in education, seven per cent in the health professions. More than twice as many degrees are given out every year in parks, recreation, leisure, and fitness studies as in philosophy and religion. Since 1970, the more higher education has expanded, the more the liberal-arts sector has shrunk in proportion to the whole.”