How is it possible for (at least here in america) so few people to have any clue whats happening in the world?

How is it possible for (at least here in america) so few people to have any clue about the worldwide **** occuring, excluding the ones backed by a Hollywood actor? Genocides, famines, nuclear threats, wars… and the average citizen, worse, the average high school student becoming a citizen, has no clue. We all seem to think that there is Iraq, Haiti, and the Gulf. Not that they aren’t important… but there is a lot more going down out there.