Overpopulation, a driver behind US and worldwide resentment toward immigration.

I think one of the reasons why there is resentment to immigration in many countries has to do with population growth.

US population has grown, recently due mostly to immigration, but imagine what it would be like if US population grew as fast as overall world population. Since 1960, world population has grown by 173% while US population (including immigration) has only grown by 116% (I looked up in Google AI).

I think the high footprint of the average American lifestyle makes population growth more of an environmental problem. Imagine what traffic would be like if the American population had grown by 173% since 1960 instead of only 116%.

Now, world population growth is slowing down, but at the same time the average footprint of individuals, worldwide, grows closer to the footprint of the average American. The average footprint of citizens worldwide is still much smaller than Americans, but look at the math. The world is gridlocked if trying to live like Americans.