Canada might have certain urban areas with public transport, but huge swaths of the country depend on cars. That is the same situation as the U.S. except we've got 10x the population as Canada...so we've got more people in more places. As for Australia, a huge chunk of the country is desert, and most people are situated along the coasts.

The U.S. doesn't want urbanism. People by and large do not want to live in dense urban areas. Some people like it, but it's not everyone's cup of tea. With the remote work revolution, it's going to become even less appealing to live in a dense urban area.

There's a trope here that the US is some incredible outlier when it comes to per capita auto ownership. It's not. It's in the same ballpark as other wealthy developed countries. It's poorer countries (in Europe and elsewhere) that have lower rates of car ownership. According to a recent Pew survey [1], the US has slightly lower per capita car ownership than Italy and is in the ballpark of countries like France, Germany, South Korea, and Japan.

[1] https://www.bloomberg.com/news/articles/2015-04-17/a-pew-sur...).

People who don't want density should be free to avoid it. What they should not be allowed to do is pass laws that prevent the rest of us from enjoying the benefits of density. The primary reason we don't have increased density in the United States is that it's illegal in most cities to build enough new housing to meaningfully densify neighborhoods.

From the internet:

Even Vancouver—Canada’s densest major city with 5,493 people per square kilometre—ranks 13th out of 30, and is significantly less dense than San Francisco (7,171 people per square kilometre), a comparable west coast city. In Toronto, there are 4,457 people per square kilometre. In fact, Toronto’s population could triple and the city would still barely have the density of Brooklyn (14,541).

And crucially, Toronto’s population density is less than many other American cities including Philadelphia (4,512), Chicago (4,594) and Boston (5,376).

>Even Vancouver—Canada’s densest major city with 5,493 people per square kilometre—ranks 13th out of 30, and is significantly less dense than San Francisco (7,171 people per square kilometre), a comparable west coast city.

The transit systems in both cities operate across the entire metro area not just the "city" proper.

Vancouver Metro Area: 2,463,431 / 2,878km² = 856 persons per km²

San Francisco Metro Area: 4,729,484 / 9,128km² = 518 persons per km²

(Numbers from Wikipedia)

>Toronto’s population could triple and the city would still barely have the density of Brooklyn (14,541)

Brooklyn is not a city. It's a densely populated subsection of one.

>crucially, Toronto’s population density is less than many other American cities including Philadelphia (4,512), Chicago (4,594)

I'm not sure why you think Chicago and Philly are not comparable to Toronto despite being being only 1% and 3% more dense. They're effectively all the same density for the purpose of this discussion.

To put those density numbers in a bit more perspective: the entire country of the Netherlands has a population density of 521 persons per km². This is including the rural areas. While I wouldn't want to be without a car and happily own two, I can take public transit within walking distance from home, and I'm on the far outskirts of the country.

My (simplified) understanding is that it's more about the ideals. Back in the day, part of the American dream was to live in a semi-secluded suburban neighborhood and own 2+ cars per family. Only the poor and young people were expected to live in city centers. Therefore, the affluent citizens spread out, and cities evolved to cater to their needs, i.e., support private cars and the road system at the cost of not properly funding public transportation. In European cities the ideal was the opposite, and it was thought that only peasants would stay secluded and all the affluent people should live in the cities, which in turn should have great public transportation for practical reasons. I'd imagine that ideal extended to Canadian and Australian cities as well.

The difference is the treatment of poor & homeless. Public transit buildings/vehicles are some of the only inside spaces where they can spend time. Then people with enough money avoid public transit as much as possible. Then they vote against more funding for transit because it is not useful to them.

Toronto: not actually that dense.

https://www.wolframalpha.com/input/?i=population+density+tor...

Well…OK, the core of Toronto is pretty dense, but the megasprawl that is amalgamated Toronto is not that dense.

But good luck getting by in any non-major metro area in Canada without a car. Toronto, Montreal, Vancouver…maybe Ottawa…it's doable, but the second you get into the suburbs, or cottage country, it's Subaru time.

> very dense cities like Montreal

Remember it was founded in 1642. The older a city is, the more dense it is.