The acronym was coined in the 1980s by University of Denver professors Penelope Canan and George W. Pring. The term was originally defined as "a lawsuit involving communications made to influence a governmental action or outcome, which resulted in a civil complaint or counterclaim filed against nongovernment individuals or organizations on a substantive issue of some public interest or social significance." The concept's originators later dropped the notion that government contact had to be about a public issue to be protected by the right to petition the government, as provided in the First Amendment. It has since been defined less broadly by some states, and more broadly in one state (California) where it includes suits about speech on any public issue.