In general I think low expectations for the (near) future of humanity and depression are correlated, but intriguingly to me, it's not an extremely tight correla

In general I think low expectations for the (near) future of humanity and depression are correlated, but intriguingly to me, it's not an extremely tight correlation. Some people think the ship's going down and manage to party and have a good time. Others aren't particularly extreme in either emotional direction even as they evince extreme pessimism. And I imagine the reverse is true too, although I don't recall seeing it.