Nightlion,
Thank you for the information on the ancient ruins at Caral, Peru. I spent a lot of time looking at this stuff last night and it turns out that, while the dates may be within a couple of centuries of the Jaredites, they do not match. Caral has been dated to about 2600 BC.
Also, the population needed to build something like the pyramids and associated city a Caral is unlikely to have been provided by a founding group that arrived in 8 barges on the west coast of Peru. The building of this city would have required thousands to be engaged by 2600 BC, not a few dozen shipwrecked seafarers (who, according to the Book of Ether. had not even arrived by 2600 BC).
The chronology that does match very well with the evidence is that from the mainstream scientific work that shows, based on the archaeological and genetic evidence, that the founding populations for the New World migrated from Siberia through Beringia to North America starting some 30,000 years and were well on their way toward South America by about 12,000 years ago.
The Clovis culture, for example, first encountered in New Mexico, has been studied since the 1930's and the time frame for this in the New World culture is now well established at 10,900 to 11,500 radio carbon years ago, as described in
Science in 2007.
http://www.sciencemag.org/content/315/5815/1122.abstractThis timeline would have put humans in the Caral area in plenty time for them to develop the cultural need for cities, as described in the BBC series you referenced, and plenty of time to generate the population needed to build it.
As to the proposed links back to Egypt, the only real link is that some of the building was going on at the same time. As pointed out by the BBC series, such ancient city building civilizations developed in several places around the world during approximately the same time frame.
So, once again, unless I missed something, the evidence for the mainstream scientific narrative for the ruins at Caral is much better than the non-existent evidence for a founding population that crossed the Pacific Ocean from the Middle East in eight unpowered barges.