Consider pairs of countries with very similar densities in population per square mile:
Or, at the other extreme:
Without a consideration of many other elements of development, economics, and culture, "density" means far less than you think.
I am utterly amazed that abortions since they became legal, in all these last decades....haven’t already eliminated poverty!!! wow.
/s
Although I grew up in India and lived there until age 20, I hate going back there to visit because of crowds everywhere. Long lines everywhere. To buy airline ticket, to buy train ticket (main mode of travel in India), to buy a movie ticket, to get a table in a restaurant, to get cash from a bank, on and on and on, crazy long lines everywhere.
I used to love to visit Mumbai in my teen years. The last time I visited Mumbai in 1984, the sidewalks were do crowded in downtown Mumbai, it was shoulder to shoulder.
Wait until USA has 4000 Million people, then it will be just as overcrowded as India.