Who's Afraid of Virginia Woolf?, first performed in the early 1960s, was a reflection of its time. The interpersonal battles between the characters of the play reflect the Cold War tensions that plagued America. It touches on everything from the death of the American Dream to fears of nuclear holocaust. (See "Symbols, Imagery, Allegory" for more details.)
George's failures represent an overall failure of the American Dream.
The ending of the play suggests that there's hope for America, if it can only learn to look at itself honestly.