The Galactic Question Center

The Anasazi creation myth shouldn't be used as a disqualifier for landbridge migration. Also, historically, their culture began around 1000 bce, long after the migration.

Anyway, without the land-bridge, I imagine that the migration would have been merely delayed until a seafaring culture made it's way out to North America. In then end, not an awful lot would be different.
 

Honestly, I think I would need to know a lot more history to answer this question adequately. I assume the first seafaring culture to reach it were the Norse? Vikings? But the first significant impacts came from Columbus's expedition. Let's assume that since no one crosses the land bridge, the land is uninhabited. Just speaking on the surface so to speak; if there are no occupants, there's no initial conflict. With that, there would be no exchange of information. Agricultural techniques would be denied to Europeans for a while longer. Disputes over land claims would be solely under Europeans. Perhaps the Asian culture would change too, and have a more expansive mindset. Instead of countries like China isolating themselves, they might advance in technology at a quicker pace. I think the changes that could occur as a result of having no land bridge are exorbitant in numbers, and life would be drastically different than it is now.
 

With out that land bridge the Indians would not have been there to help the pilgrims survive their first winter in the new world. The Spainish would never have looted all of that Aztec and Incan gold. Sachajewiah would never have led Lewis and Clark to the Pacific Ocean. Sir Walter Raliegh would never have brought Tabacco back to Europe. Corn, Tomatoes and Potato's would remain undiscovered and uneaten, no Pizza, no Taco's, no French Fries .........
 

The following sentences should not be interpreted as sarcasm, illwill or flamebait:

Sorry, BBLB, I shouldn't have been so confrontational. I should have asked what is is about the Anasazi that might make me rethink the question?

And, yes, who knows? But, that's half the fun of speculative fiction or "what-if" history.
 

I dont think much would have changed given the following two sights. they involve the DNA of native americans. It is belived that the land bridge people were some of the last to get here.
LV
http:/www.thetech.org/genetics/ask.php?id=41
http://cita.chattanooga.org/mtdna.html
 

The buffalo would have evolved into a superior culture and driven the Spanish out.
 

This is to assume the land bridge theory is correct. There very well could have been, but either way I definately believe people came here via the ocean.
 

Insofar as the impact of American Indians on the rest of the world is rather negligible, I suspect history would not be all that different in their absence.