Fredric Wertham

Seduction of the Innocent described overt or covert depictions of violence, sex, drug use, and other adult fare within "crime comics"—a term Wertham used to describe not only the popular gangster/murder-oriented titles of the time but also  superhero and horror comics as well—and asserted, based largely on undocumented anecdotes, that reading this material encouraged similar behavior in children.

Comics, especially the crime/horror titles pioneered by EC Comics, were not lacking in gruesome images; Wertham reproduced these extensively, pointing out what he saw as recurring morbid themes such as "injury to the eye" (as depicted in Plastic Man creator Jack Cole's "Murder, Morphine and Me", which he illustrated and probably wrote for publisher Magazine Village's True Crime Comics Vol. 1, #2 (May 1947); it involved dope-dealing protagonist Mary Kennedy nearly getting stabbed in the eye "by a junkie with a hypothermic needle" in her dream sequence). Many of his other conjectures, particularly about hidden sexual themes (e.g. images of female nudity concealed in drawings of muscles and tree bark, or Batman and Robin as gay partners), were met with derision within the comics industry. (Wertham's claim that Wonder Woman had a bondage subtext was somewhat better documented, as her creator William Moulton Marston had admitted as much; however, Wertham also claimed that Wonder Woman's strength and independence made her a lesbian.)

Given the subsequent emergence of organized fandom for comic books among adults who grew up reading them during Comics' Golden Age, it is ironic Wertham at one point in Seduction (pp. 89–90) asserts "I have known many adults who have treasured throughout their lives some of the books they read as children. I have never come across any adult or adolescent who had outgrown comic-book reading who would ever dream of keeping any of these 'books' for any sentimental or other reason."

What is often overlooked in discussions of Seduction of the Innocent is Wertham's analysis of the advertisements that appeared in 1950s comic books and the commercial context in which these publications existed. Wertham objected to not only the violence in the stories but also the fact that air rifles and knives were advertised alongside them. Also rarely mentioned in summaries or reviews of Seduction of the Innocent are Wertham's claims that retailers who did not want to sell material with which they were uncomfortable, such as horror comics, were essentially held to ransom by the distributors. According to Wertham, news vendors were told by the distributors that if they did not sell the objectionable comic books, they would not be allowed to sell any of the other publications being distributed.

The splash made by this book and Wertham's previous credentials as an expert witness, made it inevitable that he would appear before the Senate Subcommittee on Juvenile Delinquency led by anti-crime crusader Estes Kefauver. In extensive testimony before the committee, Wertham restated arguments from his book and pointed to comics as a major cause of juvenile crime. Beaty notes "Wertham repeated his call ... [for] national legislation based on the public health ideal that would prohibit the circulation and display of comic books to children under the age of fifteen." The committee's questioning of their next witness, EC publisher William Gaines, focused on violent scenes of the type Wertham had decried. Though the committee's final report did not blame comics for crime, it recommended that the comics industry tone down its content voluntarily; possibly taking this as a veiled threat of potential censorship, publishers developed the Comics Code Authority to censor their own content. The Code banned not only violent images but also entire words and concepts (e.g. "terror" and "zombies") and dictated that criminals must always be punished—thus destroying most EC-style titles, and leaving a sanitized subset of superhero comics as the chief remaining genre. Wertham described the Comics Code as inadequate, while most in the industry found it draconian.