JEZEBEL Actually Pre-Dates GWTW
It's interesting that with all the comparisons to GWTW that find JEZEBEL wanting, nobody ever seems to think JEZEBEL could have had any influence on GWTW - yet JEZEBEL was first presented on the stage in 1934 - two years before GWTW was published! Of course, Margaret Mitchell had been working on her novel for 8 years or so by 1934, and I don't think she got to New York during JEZEBEL's brief run (something like 34 performances - it starred Miriam Hopkins). That said, it's also known that JEZEBEL underwent some structural and plot changes in the transition from stage to screen, so it's likely that the novel GWTW (published in 1936) most likely had some influence on the film JEZEBEL (filmed in 1937/38), because GWTW was already so much in the public's consciousness and there was so much anticipation of Selznick's film version, which didn't even begin filming until the end of 1938, many months after JEZEBEL's release.
Those of you who think you know everything should politely defer to those of us who actually do!