In 1992, Horowitz and Collier founded "Heterodoxy," a monthly magazine focused on exposing what it described as excessive political correctness on United States college and university campuses. It was "meant to have the feel of a samizdat publication inside the gulag of the PC correct university". The tabloid was directed at university students, whom Horowitz viewed as indoctrinated by the entrenched Left. In "Radical Son", he wrote that universities were no longer effective in presenting both sides of political arguments. He stated that left-wing professors had created an atmosphere of political "terror" on campuses.