Speaking as an American who lived in India for a year and a half, I have a lot of sympathies to this position. In fact, I wrote a very similar piece in 2014 for Takshashila. http://pragati.nationalinterest.in/2014/10/sharing-indias-democratic-talents/
The thing that, I think, is missing from this is the idea that the genuinely multicultural and open societies are going to have a structural advantage, politically and economically, in the next phase of rapid globalization powered by technology.
Think the US and India, sure. But also Indonesia, parts of Africa (especially Nigeria, much of East Africa, and South Africa, if they ever fix their politics), Brazil, Canada and Mexico, etc.
So it isn’t so much about polarity, as you conclude. There are the countries that will be mobilized by forms of nationalism — and both India and the US are, even if it is failing, will fail in both — and those that have some sort of cultural DNA to stay open.
China is interesting to me as a country that has a cultural DNA as closed, Hong Kong and Taiwan are the opposite. How they wrestle with that will be hugely impactful.