If this event had not happened, George would have known that murder for any reason was wrong. George, however, has been blinded by grief. In the end, all the characters have demonstrated moral ambiguity. Gatsby has made his money bootlegging; Daisy uses men for what they can give her -- Tom, money and status, and Gatsby, adoration. Tom thinks it is his right to bully his way through the world. Both Daisy and Tom know that it is Daisy who hit and killed Myrtle, but both are quite willing to let Gatsby lie and say he was the driver. Jordan is a professional golfer who cheats at her game, and Nick knows this but falls for her anyway. Nick wants to believe that he stands apart from his companions,...

Myrtle Wilson is seduced by the superficial glamour of Tom's life, and the one person who seemed untouched by it all, George Wilson, ends up committing the most immoral act of all: he deliberately takes another man's life, and feels justified for having done so.
SOURCES

Fitzgerald, F. Scott. The Great Gatsby. New York: Scribner/Simon & Schuster, 1995.

Hermanson, Casie E. "Criticism," in Novels for Students, Vol. 2. New York: Gale, 1997.

Hermanson,

Samuels, Charles Thomas. "Essay," in Novels for Students, Vol. 2. New York: Gale, 1997.