Just a quick couple comments:

1) There are lots of unifying themes and grounds of meaning besides God -- the motherland, the continuity of the family, evolution, personal actualization, etc.

2) I disagree with most statements to the effect that "everything is different now", though the OP has a couple of interesting points. First -- disconnectedness has been a theme in the arts since the turn of the century (Dada, Sartre, etc). Second, I think that folks sitting around the campfire in the Kalahari probably like drama just as much as we do, they just that their media are different -- stories, songs, and low tech ritual versus TV; but I think the charge of meaning is the same, even if the amount of color and noise is vastly different.