>>1933Modern anarchist theory has a lot of roots in Italian socialism. Especially anything that talks about revolutionary violence or resistance to achieve an anarchic system and maintain it. That is insurrectionary anarchism and is socialist in origin. The socialists have been one of the dominant schools in anarchist theory for the better part of the 20th century.
It was even a big part of why the Republican forces fell into infighting during the Spanish Civil War, some were communist and some were anarchists and/or syndicalist. It is not really a new development. If anything, the skater boy anarchist thing is the new phenomenon.