The assessment is universal in the way I specified. It's existential or transcendental, which isn't to say it's as universal as physics or metaphysics. It's universal for our species (and for all social creatures).

Many of my writings do assume dualism, but that's often a descriptive matter, as in I'm describing how our species tends to relate to the world. What I call "Promethean" or "Faustian" progress, for example, assumes an antagonistic relationship between us and nature. I assert that--with some exceptions of course--our species takes up that dualism. As mystics agree, we tend to think in dichotomies.

I also point out in some writings that the dualism will likely be transcended by nature since long after our species is extinguished it will be as if we never lived. This is the cosmicist side of my philosophy.

But I don't really take a firm stance on dualism vs monism at the metaphysical level. I treat metaphysics as a form of academic story-telling, so I'd prefer to evaluate the stories in aesthetic terms.