>I wonder: Is the absence of such a thing as a public square a matter
>of significance for the nature of political action in the United States?
Yes, is it ever! It not only removes actual public space, it removes the possiblity of thinking that any such thing might exist.
Where are the public spaces now? The mall? No. Church? No. Sport arenas? No.
The church would be a good candidate, but not until the left can rethink their atheism.