"This Earth Is Mine" is a very glossy film from Universal Studios that obviously cost a lot of money. It featured some top stars and was set in lovely Napa Valley....but, sadly, the story was apparently written by chimpanzees...albeit moderately talented chimps! In other words, it looks great...but is, essentially, trash when it comes to writing.
The film begins with Elizabeth Rambeau coming to Napa to see the family she's never met. Apparently, her father ran off with her mother long ago and she was raised away from her father's extended family's influence. As for this new family, they are wealthy grape growers...the pride of the county.
When Elizabeth meets her cousin, John (Rock Hudson), she sees that he's a bit of a black sheep in the family. While the patriarch (Claude Rains) seems content to wait until prohibition EVENTUALLY ends (it's been 12 years already...so he's an insanely patient man), John is in favor of selling the grapes to the highest bidders...which, not surprisingly, are the mob who is eager to convert this grape juice into wine.
As far as John and Elizabeth go, this is a HUGE problem with the film. First, she detests him and he insists she REALLY means 'yes'...a very dangerous trope. Second, out of the blue, she DOES come to love him. Not only was this dangerous, as it lends credence to the 'she says NO when she means YES' mentality but also because she goes from hating him to loving John for no discernible reason. This makes no sense and really is bad writing. What's next? See the film...or not.
So, if this is just a bad but very slick film, why did I watch it in the first place? Well, I recently moved to California wine country and live within relatively short driving distance from Napa. And, the film is interesting in this sense. Seeing the old vineyards and what Napa was like long ago (it's set in the 1930s) was interesting. Unfortunately, the rest of the film is poorly written and dull. There are some nice story elements (such as the illegitimate child portion of the movie), but overall it's tedious and not the movie it could have been. It only earns a 4 because it is interesting historically and looks nice. Otherwise, it's a slick and glitzy bad movie.