The term, WASP, was initially coined to describe the Northeastern upper classes who dominated industry, finance, and higher education before World War II. That upper class was predominantly, though not exclusively, of English colonial descent: the DuPonts, Roosevelts, and Vanderbilts, for example. Catholics, Jews, Southerners, and Westerners were outside this elite. Not that there were not wealthy and influential men who were not part of the WASP elite, e.g., the "Our Crowd" of German Jews, but they were not the leaders of finance or industry.
Very interesting; thanks.