The article is largely a review/update on the state of the research being done into disaster-related mental health conditions. Thus all the support for the arguments is research based rather than example based. The author backs up their definition of disasters in three categories: natural, human-made nonintentional, and human-made intentional. These criteria affect the outcomes for the psyches of the victims, with the human-made disasters carrying more weight, particularily the intentional ones.
PTSD has been continually supported in literature, and the author simply recites sources of research dating back to the Vietnam War. The WHO has since devleoped more detailed planning tools and treatment tools for victims of trauma.
The authors also cite multiple levels of research into the risk factors for multiple mental health issues, regardless of and related to specific disasters.