What do you hope readers take away?
That we may have more surges of migration which nobody has anticipated. Americans in 1970 weren't writing that Texas was going to be the great growth state of the next 40 years, as it turned out to be. Experts did not predict the heavy migration from Mexico or East and South Asia. So we should be prepared for the unexpected. With respect to current immigration policy, I think that we should be less concerned about more people coming over the land border from Mexico. We should be more concerned to try and tilt our immigration more towards high-skill immigrants, as our Anglosphere cousins Canada and Australia have successfully done.