The expanding circle refers to the range of sentient beings that humans include in their scope of concern. The fact that we have recognized the non-existence of gods or the non-sentience of a fetus is not the same as shrinking or the circle. The fact that we no longer have concern for the dead is, again, not relevant. Our consideration for property is equally rejected by this simple consideration. You could certainly argue that from the perspective of a past human, the circle would seem to shift, but that does not change the fact that using our reasonable modern understanding of the world, the scope of human concern for sentient beings has consistently expanded, rather than shifted.
The expanding circle refers to the range of sentient beings that humans include in their scope of concern. The fact that we have recognized the non-existence of gods or the non-sentience of a fetus is not the same as shrinking or the circle. The fact that we no longer have concern for the dead is, again, not relevant. Our consideration for property is equally rejected by this simple consideration. You could certainly argue that from the perspective of a past human, the circle would seem to shift, but that does not change the fact that using our reasonable modern understanding of the world, the scope of human concern for sentient beings has consistently expanded, rather than shifted.