federal statute passed by the U.S. Congress in 1873 as an “Act of the Suppression of Trade in, and Circulation of, Obscene Literature and Articles of Immoral Use.”

Named for Anthony Comstock (Comstock, Anthony), a zealous crusader against what he considered to be obscenity, the act criminalized publication, distribution, and possession of information about or devices or medications for “unlawful” abortion or contraception. Individuals convicted of violating the Comstock Act could receive up to five years of imprisonment with hard labour and a fine of up to $2,000. The act also banned distribution through the mail and import of materials from abroad, with provisions for even stronger penalties and fines.

Vestiges of the act endured as the law of the land into the 1990s. In 1971 Congress removed the language concerning contraception, and federal courts until Wade (Roe v. Wade) (1973) ruled that it applied only to “unlawful” abortions. After Roe, laws criminalizing transportation of information about abortion remained on the books, and, although they have not been enforced, they have been expanded to ban distribution of abortion-related information on the Internet. Representative Barney Frank of Massachusetts introduced legislation in 1997 to repeal abortion-related elements of federal obscenity law rooted in the Comstock Act.