Sounds like the only responsible country in the developing world is China. They, at least try to address problems of overpopulation and increase the standard of living. India and the Islamic world are hungry for the numbers over a decent standard of living.

Sounds like an argument for stricter immigration, particularly if these countries expect to export excess population.

In short, the West is stuffed. Perhaps it’s our time to go as have other civilisations in the past, but we (i.e. the cultural relativists and moronic politicians) are either actively encouraging our own demise or, at best, doing nothing about it. In matters of trade, technology and jobs, the Indians are already laughing their heads off at our stupidity. China’s communism and brutality to its own people has been put aside so that we can sell them uranium and other raw materials we dig out of the ground like ignorant peasants, while China knocks our manufacturing in the head with slave-like labour and appalling conditions for workers and citizens. And Islam? Well that’s well on the march to eventual world domination which will see even China and India out the door, turning the world back to the dark ages.

Globalisation of employment, production standards, standards of living, wealth balance, equal rights, human rights, increased social expenditure; ie. housing, cars, insurance, education, retirement savings, all the little niceties that have our bank cards maxed will most likely affect all these other countries in turn.
India and China have some serious challenges ahead. Both countries have placed a greater value on male children and I have read that India by 2020 will have a huge population of males turning 25 years old that will be finished with their education and looking for employment and wives. Birth control will be vital for these countries as well as a 360 degree turn about regarding their thinking on large families. I'm unsure as to what the author means by including "many in Europe and the United States extol the virtues of birth control and abortion". Are Australians above such means?

If present trends continue the scenario described in this essay will most probably come true.
But meanwhile China is already one vast environmemtal disaster area and it will be impossible to do anything about it.
It is also impossible for the millions of aspiring Indians and Chinese to live a western middle class lifestyle. The ecosystems of the planet cannot support it.
Sooner or later the planet will bite back.
And we really do have a planetary over-population population altogether.
At least a billion people already lives in appalling slums. And their numbers a growing every day as the relentless capitalist world machine grinds all traditional ways of living to dust! See Planet of Slums by Mike Davis.

I seem to recall someone saying all of this before. "Please Explain".

I guess my response to the changing ethno-demographics (if there is such a word) is: so what?

Intellectually it's fun game to leap by half or full centuries and compare and contrast with 'our' world but in fifty years time some baby born today will be a middle-aged person living in their equivalent of 'our' world and not be any the wiser, other than to look back and say 'it was different in the olden days'.

It's easy to highlight racial profiles for mention and forget to recognise the changes that will occur in technology, energy, climate etc. In the end we may occupy different countries but we are still all Homo Sapiens scattered across the planet.