We are witnessing the birth of a new theory of the person: the Non-Cartesian view. This view eschews solipsistic thought while paying respectful dues to the notion of the phenomenal. It is a fundamental shift in perspective that encourages us to read our own lives and world as collectively constituted out of the multiple patterns of coordination we live in. The notion of agency is reduced to an admission of ignorance and a recognition that the only possible agreement on this topic is one of consensus.
This view must be contrasted with the Cartesian view, to establish which frame of reference is being used. Neither may claim an absolute hold on truth. Only so can we harbour hopes of creating a Human Science.