America was THE target in WWIII.
Are sure that there are any left by 2370?
RIKER: Makes sense. Most of the major cities have been destroyed. There are few governments left. Six hundred million dead. No resistance.
Then Colonel Green built death camps all over the world to remove any one with radioactive genetic damage from the gene pool to preserve the integrity of the species.
Which probably doubled or tripled the body count, if he's also extracting any with a regular congenital diseases like MS, cancer or Asthma.
Space Indian's might have been the only Indians left.