The brain is pretty much like a muscle. It has to be trained and used to strengthen. The brain has many facilities though, and just as if you train your legs and not your arms, you will have strong legs and week arms, you csn train certain faculties of the brain and neglect others. In our society, we train people to react so that they can be good consumers and we sometimes train them to think, at least to the level that is needed, so that they can be good employees. We don't train people to care. It's not that people cannot care [insert refutal of the caveman myth] , it's really just a matter of training.