Immigration is a BIG PROBLEM now because Assimilation does not happen anymore because of social media.
In the past, immigrants were surrounded by "Americans" face-to-face. They had no option other than integrate/assimilate.
Now, you can live in the fake reality of social media thus eliminating integration/assimilation.
This now extends beyond immigrants and the new generation is not assimilating - they are living in their screen realities.
This combined with contraception has destroyed reproduction which was inevitable before these technologies - no matter how hard you tried NOT to get the girl pregnant.
Boy meets girl,
Boy kisses girl,
Babies!
We are so fucked.... (or is it no-fucked?)