E. Digby Baltzell was thinking about saving space when he squeezed the abbreviation ”WASP” into the tables of his 1964 book, “Protestant Establishment.” In so doing, the University of Pennsylvania sociologist coined a term that caught on and has become a permanent addition to our language. Baltzell, himself a white Anglo-Saxon Protestant, was one of America’s foremost authorities on the ruling elite. He died at a Boston hospital this weekend of a heart attack at the age of 80.