At GameFAQs, there has been posted, yet another theory. Providing the theories—and the link, of course—to help form counter-arguments. This should further our understanding of what it is we study, as any endeavor we choose to pursue.
I now present—without any further ado on my part—the theories.
This may have been brought up before, but in 65 000 000 BC, there are two tribes, the Ioka, and the Laruba.
The laruba have Blue hair. When you talk to one of them in their burned village, she/he says that he had a red rock but it made him feel funny so he threw it away, or something like that. Could it be that the laruba were the foundation for the Zeal royal family?
They may have gained intellegence, or magic from the dream stones. THis is supported by the fact that the Nu speaks perfectly when he holds the red rock, but when he gives it to you he speaks like an idiot.
There is some reason to all of this—as far as the Ioka/Laruba point—however, some points are quite absurd. Such as his suggestion that dreamstone was the primary cause for the evolution. Dreamstone! What's more, this was posted on the Chrono Cross board!
Of course, a few replies later, another—quite similar— theory was posted by another pondering fan.
Yay! Someone else has the same theory as me!
Anyway, the Nu in the Laruban ruins gave you the Silver Rock, which therefore can't be Dreamstone.
Aside from that, your theory matches mine nicely.
Larubans: Blue/purple hair.
Iokans: Brown hair.
Zealans: Blue/purple hair.
Earthbound: Brown hair.
Now, over 64,088,000 years, one would expect enough diffusion that that would be evidence of jack and squat. However, this is a Japanese video game, and stuff like hair color tends to mean stuff, I'm told. I therefore rule out coincidence.
Second point: The Larubans were always hiding themselves while the Iokans were the warrior types.
The Zealans probably raised their lands not only for the superiority factor but as prevention of an uprising.
I admit this particular connection is tenuous, but it could work.
Third point: The Larubans could tame the Dactyls. This implies an affinity with the natural world and/or latent magical talent. Either would be conducive to learning the secrets of a magical stone.
So my theory is thus:
The Larubans found out they could channel magical energies through the Dreamstone, harnessed those energies, and eventually refined them to the point where they were a race of skilled mages.
The Iokans, a warrior tribe, would fear such a thing, and woudl likely try to lash out and eliminate this percieved threat. After all, with magic, strength becomes irrelevant, and remaining hidden won't stop them from carrying out attacks with magic.
Eventually, at a point probably far closer to 12kBC than to 65MBC, the Larubans grow powerful enough and skilled enough to raise masses of land into the sky indefinitely (q.v. Netheril). Here, they establish their kingdom, and rename it after their royal dynasty, Zeal.
At some indeterminate point, which may be before or after the above paragraph, they grow arrogant enough to presume superiority over the Iokans, and once they levitate their lands, they can literally look down on their former neighbors and call them "earthbound".
This is the theory as I have developed it. Interestingly, I originally had this idea in a theory I had about Lavos itself, back in the pre-CC days. This sort of spun off of part of that, and over time, grew refined to what you see above.
First off, I am glad to see that he addresses the Nu/Red Rock point, as it was a rather moot point. I am also intrigued by the hair color notion, which—ridiculous as it may sound—has proven true time and time again.
It does, sadly, seem to completely ignore the existence of the Frozen Flame.
"GameFAQs General Message List." CJayC. 16 November 2004. CNET Networks. 19 November 2004. <http://boards.gamefaqs.com/gfaqs/genmessage.php?board=24058&topic=17544357>.