VK, I want to thank you for posting your question. I was going to expand on KB’s response and provide what I thought was the correct answer about the origins of North American cultures. I always held the “Beringian Bridge” theory to be true, but just to make sure I decided to do some researching on the subject. Thanks to you, I discovered through my research that what I always assumed to be true was incorrect. What a startling discovery to find not only the true facts, but also how the liberal establishment has tried to refute scientific discovery to further it’s politically correct bias. Here’s a summation of what I found.
The politically correct view of history reflects it’s anti-white bias and its deference to so called “Native Americans”. Traditional theory, The Beringian Bridge theory, espouses the conventional view that the first settlers of the Americas were Asian predecessors of Indians. The Beringian Bridge theory holds that large bands of Proto-Mongoloids (or those whom the politically correct romanticize as "Native Americans") migrated over a land bridge connecting the two continents twelve to fourteen thousand years ago.
Archeologists and scientists now believe two separate Caucasian cultures preceded American Indians, one by at least 4,000 years. Two prominent archeologists, Dennis Stanford and Bruce Bradley, suggested that the Solutrean people crossed the Atlantic from what is now northern Spain and southern France about 18,000 years ago and settled in North America, establishing what is now called the "Clovis" culture. The second culture was discovered with the unearthing of “Kennewick Man” in the state of Washington in 1996, who did not belong to any American Indian tribe. Dated around 9,300 years, Kennewick Man most closely resembles the Ainu of Japan - an early Caucasoid people which was the original race of Japan, pre-dating the Mongoloid types.
“Native Americans” have been battling in court to have the remains of Kennewick Man buried as a “Native American”, and have been helped in their effort in the past by the Clinton administration and other liberals. Indians vandalized and compromised the integrity of the remains to accomplish their aim. Motivated by their liberal and politically correct bias, Clinton’s administration worked hard at perpetrating the fraud to promote this politically correct but historically false history. Bruce Babbit, the former Secretary of the U.S. Interior Department under Clinton, spun this: "Although ambiguities in the data made this a close call, I was persuaded by the geographic data and oral histories of the five tribes that collectively assert they are descendants of people who have been in the region of the Upper Columbia Plateau for a very long time," according to the Associated Press. And with that pretext, he decided that Kennewick Man was to be given to five American Indian tribes who claim him as an ancestor. Fortunately, the U.S. District Court for Oregon dismissed Babbitt's conclusion as ''arbitrary and capricious''.
Subsequently, science has defied the “politically correct” establishment by verifying the remains to be Caucasoid. Therefore, the long held view that “Native American” Indians were the first cultures inhabiting North America has been proven false. The first culture is now believed to be the “Clovis”, a white culture originating from Europe, followed by Kennewick Man, a Caucasoid culture originating in Japan.
Anyone interested can search under “Clovis” or “Kennewick Man” in your search engine for much broader data on the subject.