I've often said (to friends) that the Moon is the object that most living beings with eyes, have seen. We don't see further than 8 km around us but we see the Moon.

No other single object shares that. The Sun is too bright to look at.

Beings on the other side of the world, even completely unaware of other similar beings, are sharing the same sight of the Moon.

However, perhaps most beings with eyes don't see very far or can't see stars and the Moon.

We can and we could, even when we didn't know about our brothers all around.

This is also why the Moon is far more relevant to mankind than Mars is.