This article argues that in the Cartesian Cosmology it is not clear how we can talk about or refer to individual bodies in the context of a compact universe. It defends that the concept of individual body inside of this Cosmology can be built as a fiction of the spirit. This concept can be constructed as the extension that is locked up in a maximal surface whose subdivisions have no relative movement between them. It is also shown that Cartesian Cosmology can be seen as a trivial model of M-theory.
