There isn't a culture to be cultured against any more. This isn't 1960 where there is one medium that connects 75%+ of people. What you have now are a lot of different cultures.
That's definitely not true. Travel to some country on the other side of the world and you can appreciate for yourself that, subcultures aside, there is a large body of shared cultural beliefs and practices that most of us more or less share.
I don't know if I'd say that, but the persistent idea that we're all charting a unique ideological course from first principles is, I think, somewhat characteristic.