Traditional American people? I didn't realize those inventions you mentioned were developed on reservations. The rest of us aren't usually more than a few generations removed from immigrants. This was especially true half a century or more ago when those technologies you listed were developed.
Can you please cite the evidence where the overall economy, real wages, or standard-of-living of Americans has "collapsed" since 1965? Or where "fundamental technological innovation" has ceased? Increased economic prosperity for nations outside of the US and Western Europe may be a scary prospect to racists and xenophobes, but it's not necessarily the death knell for America.