If your goal is to write a fictional story, then you can make up whatever suits your fantasy. If you want to “be right and shake up America,” then evidence might help.
The goal is to use as much as possible known facts and fill up the gaps with fiction. But not fiction like aliens, demons, vampires but plausible fiction.
Also, the goal is not to offer documented, solid evidence since I do not have access to them but to open a new direction of research which would lead to new evidence.