Earlier quoted context omitted.
The problem is that the United States isn't a 'country' in the way the UK, or Denmark, or Australia is. The entire population of Denmark is 5.59 million, the size of a single second or third tier city in the US. Australia is 22 million, the size of the NYC metro area. You can socialise and centralise healthcare in countries on such a small scale, but it becomes exponentially more difficult to do in a country like the…
> "It's the reason why if you look at a list of the world's oldest nations the United States is right at the top, and is one of the largest." Really? Please can you elaborate on this as it makes no sense to me.
There's plenty of stuff in there to debate (the US did have a rather bloody civil war, so it's not like it's been perfectly stable), but his argument is plausible enough - I'm not sure why it makes no sense to you. Personally, traveling around the United States has convinced me that there's ten countries worth of distinct cultures in it - one-size-fits-all government isn't going to work well.