It is not likely any of them will gladly accept new members.
Gaining acceptance by a tribe and finding ways to not die if you ever become disfavored seems like part of the whole hunter-gatherer package, don't you think?
They tend not to be very wealthy by modern standards. Maybe you could ingratiate yourself to them with them gifts of things that require modern manufacturing infrastructure.
That's never true. Influence might be tiny, but it's not zero.
There's an irony, in that believing nothing can be done ensures that nothing is done.
> ...go read Wikipedia for 30 minutes and be just as caught up as anyone else because you know the end result of the news cycle instead of suffering through it as it happened.