"rise in college attendance means that...a degree is a less significant indicator of intelligence now than it once was...Marine Corps officers have reflected this trend, declining in average intelligence along with the population of college graduates" https://ndupress.ndu.edu/Portals/68/Documents/jfq/jfq-81/jfq-81_54-61_Cancian.pdf
"41 percent of new officers in 2014 would not have qualified to be officers by the standards held at the time of World War II."