uses the metaphor of a visual novel in several interviews, describing each episode as a chapter, and has also commented that this allows a fuller exploration of the show's themes in time not spent on plot development. Social commentary Simon described the second season as "a meditation on the death of work and the betrayal of the American working class ... it is a deliberate argument that unencumbered capitalism is not a substitute for social policy; that on its own, without a social compact, raw capitalism is destined to serve the few at the expense of the many." He added that season 3 "reflects on the nature of reform and reformers, and whether there is any possibility that political processes, long calcified, can mitigate against the forces currently arrayed against individuals." The third season is also an allegory that draws explicit parallels between the Iraq War and drug prohibition, which in Simon's view has failed in its aims and has become a war against America's underclass. This is portrayed by Major Colvin, imparting to Carver his view that policing has been allowed to become a war and thus will never succeed in its aims. Writer Ed Burns, who worked as a public school teacher after retiring from the Baltimore police force shortly before going to work with Simon, has called education the theme of the fourth season. Rather than focusing solely on the school system, the fourth season looks at schools as a porous part of the community that are affected by problems outside of their boundaries. Burns states that education comes from many sources other than schools and that children can be educated by other means, including contact with the drug dealers they work for. Burns and Simon see the theme as an opportunity to explore how individuals end up like the show's criminal characters, and to dramatize the notion that hard work is not always justly rewarded. Themes Institutional dysfunction Simon has identified the organizations featured in the show—the Baltimore Police Department, City Hall, the Baltimore public school system, the Barksdale drug trafficking operation, The Baltimore Sun, and the stevedores' union—as comparable institutions. All are dysfunctional in some way, and the characters are typically betrayed by the institutions that they accept in their lives. There is also a sentiment echoed by a detective in Narcotics—"Shit rolls downhill"—which describes how superiors, especially in the higher tiers of the Police