The big issue I have with one merged, default race is that doesn't exist today, so how do you represent it in film? There are only two ways to do it.
1). Cast the entire film with one ethnicity representing the default race of the future.
This is a pretty obviously bad solution, and it's pretty obvious what the "default race" selected would be.
2). Completely disregard any race in casting - thus, theoretically, Leto could be played by a native actor, Jessica by sub Saharan African actress and Paul by an Indian actor.
A much more acceptable option than 1 but I sincerely doubt it would be done in todays atmosphere.
I don't know if the Landsraad being closely related is really true. In fact, it's specified in the novel that while Leto is an (extremely) distant cousin of the Emperor, the Harkonnens have no blood relationship to the imperial family - beyond Paul through Jessica. That's after thousands of years of being Nobility and intermarriage with other noble families - they still haven't managed a blood connection to the Corrinno's. That helps show how big the universe is. Despite the comparisons to feudal Europe we aren't talking about a small handful of families interbreeding - were talking hundreds and hundreds of thousands (if not millions) of majority and minor houses ruling over a million worlds.
Another problem with the idea that humanity evolved into a single race is isolation. Each planet is still isolated with really only the upper and class able to afford regular space travel. The people on each planets are evolving independently to better suit their world's. The Fremen are expressly described this way, with notable differences in internal organs to improve water conservation.
This isolationist evolution is the major reason for Paul's Jihad - the unconscious yearning of humanity to end the stagnation of its genes and wildly mix the peoples of the universe.
1). Cast the entire film with one ethnicity representing the default race of the future.
This is a pretty obviously bad solution, and it's pretty obvious what the "default race" selected would be.
2). Completely disregard any race in casting - thus, theoretically, Leto could be played by a native actor, Jessica by sub Saharan African actress and Paul by an Indian actor.
A much more acceptable option than 1 but I sincerely doubt it would be done in todays atmosphere.
I don't know if the Landsraad being closely related is really true. In fact, it's specified in the novel that while Leto is an (extremely) distant cousin of the Emperor, the Harkonnens have no blood relationship to the imperial family - beyond Paul through Jessica. That's after thousands of years of being Nobility and intermarriage with other noble families - they still haven't managed a blood connection to the Corrinno's. That helps show how big the universe is. Despite the comparisons to feudal Europe we aren't talking about a small handful of families interbreeding - were talking hundreds and hundreds of thousands (if not millions) of majority and minor houses ruling over a million worlds.
Another problem with the idea that humanity evolved into a single race is isolation. Each planet is still isolated with really only the upper and class able to afford regular space travel. The people on each planets are evolving independently to better suit their world's. The Fremen are expressly described this way, with notable differences in internal organs to improve water conservation.
This isolationist evolution is the major reason for Paul's Jihad - the unconscious yearning of humanity to end the stagnation of its genes and wildly mix the peoples of the universe.