A lot of philosophical work has been done explicitly against Cartesian Dualism. Wittgenstein's, extremely influential, "Philosophical Investigations" is probabl

A lot of philosophical work has been done explicitly against Cartesian Dualism. Wittgenstein's, extremely influential, "Philosophical Investigations" is probably the biggest example. The entire book is dedicated to dissolving the problem posed by dualism, and presents a conceptual approach that makes the "hard" problem of consciousness, or the problem of understanding someones feelings, effectively not really a problem at all. Much of the problem is more a result of conceptual confusion than anything else. The [Private Language Argument](https://plato.stanford.edu/entries/private-language https://plato.stanford.edu/entries/private-language) is probably the most famous. Its result can also be extended to pain, feelings, and vision. Fundamentally private subjectivity is largely a misconception. It's like trying to use a currency that has no purchasing power. Insistence on subjectivity and subjective experience is more productively understood as "personal" rather than as "private".