[imbnwa]

This assessment seems largely accurate. I'd add that much of the 'controversial' epistemology and ethics groundwork for that modern center-left was laid in 80s/90s Queer theory, Critical Legal Studies, and Critical Race Theory; it just so happens that following 2008 these fields finally begun making their way into popular consciousness (I'd add that in American high school and college policy debate competitions, this literature was already fairly well-known and under intense discussion and, er, debate).

There really is not much new here.