Jonah, this could be the sort of controversy that will drive away any readers that we may have, but while fascism may have socialist roots (Mussolini himself was, as you know, originally a socialist), it’s at least arguable that, in addition to the nationalist component you mention, fascism evolved into a distinctively corporatist ideology. While the fascist state could – and did – control some of the means of production, there was no belief in the need to expropriate all of them. Unlike socialism, fascism sought to co-opt rather than replace many of the existing institutions within a society: fascists were in that sense far less revolutionary than the folks with red flags. That said, both ideologies have one thing in common – individuals counted for little or nothing.

As to who is – or is not – a ‘fascist’ these days, I’ve seen an interesting case made that, in some ways, communitarians are the natural (but certainly far more benign) inheritors of that particular intellectual tradition.