It seems as though when science fiction envisions a better, or at least more advanced, version of humanity it is one without disability, and thus one without disabled people. When you imagine a future without disability, it is a future in which you imagine that there are no disabled people.
It seems as though when science fiction envisions a better, or at least more advanced, version of humanity it is one without disability, and thus one without disabled people. When you imagine a future without disability, it is a future in which you imagine that there are no disabled people.