Is it possible that there is a linkage between Caral and the chain of cultures that progressed north into the American Southwest?
It would seem likely that vanguards from a given culture would seek out similar geographic and climatic conditions in order to take maximum advantage of existing technology and agricultural practice.
That is, could Chaco somehow be a lineal descendant of Caral...???
Don't know specifically about Caral but, there are many who study in this area that think that a lot of 'things' flowed from south to north. (Instead of the other way)