Apathetic : showing or feeling little or no emotion. Ex. It is disturbing how apathetic people can be about disasters, atrocities, and wars when there is not a dramatic mainstream media frenzy surrounding them or when they do not understand the impact on themselves.
Empathy : the feeling of, or ability to, feel the emotions or sensations of another. Note: Empathy is stronger, or more intimate, than sympathy.
Pathology : literally the study of suffering. Note: Today, it is the study of disease.
Sociopath : A mentally ill or unstable person who acts in a way that harms people and society. Note. This is broader than the technical psychological description, which is measured by an inventory of behaviors or characteristics. Ex. The documentary "The Corporation" portrays corporations as sociopath's- the movie argues that corporations, as independent legal entities, can become ill or unstable and act in ways that harm people or society.
