Horcruxology II: Objects of future pasts and prenatal life

The project develops a conceptual framework for what happens when the future can be said to haunt the present. How do present objects of various kinds hint at future scenarios or generate specific future realities? When Greta Thunberg for example said that the eyes of all future generations are upon you, in what way can we (the living) be said to host the unborn who do not yet exist?