page contents with all the discussion on immigration, i think the answer is to treat people like the fish in the ocean. No boarders, but you have a home and can visit others as long as you have a reason and are good to the nation you are visitng.

Been a problem for a long time, although different clothes, the same dream and same difficulties comes out in this wonderful musical piece.

From west side story (video there):

Puerto RicoMy heart’s devotion
Let it sink back in the ocean
Always the hurricanes blowing
Always the population growing
And the money owing
And the sunlight streaming
And the natives steaming
I like the island Manhattan
Smoke on your pipe
And put that in!
I like to be in America
Okay by me in America
Everything free in America
For a small fee in America
Buying on credit is so nice
One look at us and they charge twice
I have my own washing machine
What will you have not to keep clean
Skyscrapers bloom in America
Cadillacs zoom in America
Industry boom in America
Twelve in a room in America
Lots of new housing with more space
Lots of doors slamming in our face
I’ll get a terrace apartment
Better get rid of your accent
Life can be bright in America
If you can fight in America
Life is all right in America
If you’re a white in America
Here you are free and you have pride
Long as you stay on your own side
Free to be anything you choose
Free to wait tables and shine shoes
Everywhere grime in America
Organized crime in America
Terrible time in America
You forget I’m in America
I think I’ll go back to San Juan
I know a boat you can get on
(Bye Bye)
Everyone there will give big cheer!
Everyone there will have moved here

Read more: Westside Story – America Lyrics | MetroLyrics 

Another great modern song about immigration is from Hamilton. Performed here: