I thought John’s comment begs mentioning an important point here …
There are two WASP cultures … one is the historic one … the other, the remnants WASP culture in modern America.
And as, if I thought the historic version would be easy to define … uh, it’s a bit more complicated than that. <sigh>.
In looking for an earliest date for WASP culture I turned to that fount of all knowledge, Wikipedia.
The definition and history are both extensive and specific … if you have an interest, here is the link:
Regarding the traiditonal culture … the term WASP is a new idea (1940’s thru today) … However, the culture it refers to is very old, this group were at their earliest essence American Yankees … traditional Yankees can be defined as people who’s families arrived PRIOR to 1776.
As the Founding Fathers of our nation, they weren’t just bad … they weren’t just good. They were both.
Or put another way … they just were.
One can get into all sorts of discussions about the good and bad of American (founding) society … I don’t know how much merit or interest that discussion would have here. AS SUCH … it would strike me that a discussion of modern WASP culture might be a bit more topical.