Luhmann is probably best known to North Americans for his debate with the critical theorist Jürgen Habermas over the potential of social systems theory. Like his erstwhile mentor Talcott Parsons, Luhmann is an advocate of "grand theory", although neither in the sense of philosophical foundationalism nor in the sense of "meta-narrative" as often invoked in the critical works of post-modernist writers. Rather, Luhmann's work tracks closer to complexity theory broadly speaking, in that it aims to address any aspect of social life within a universal theoretical framework — as the diversity of subjects he wrote on indicates. Luhmann's theory is sometimes dismissed as highly abstract and complex, particularly within the Anglophone world, whereas his work has had a more lasting influence on scholars from German-speaking countries, Scandinavia and Italy.