Landmark was founded in 1976 as an offshoot of The National Legal Center for the Public Interest with its focus on protecting individual rights, challenging the scope and authority of government, defending free enterprise, and exposing teachers' union fraud. Landmark has made efforts to scale back funding for non-profits which it holds to be political in nature but list no political expenditures on tax forms.
Landmark was established in 1976 as a distinct organization from The National Legal Center for Public Interest, emphasizing the protection of individual rights, the limitation of government authority, the promotion of private enterprise, and the exposure of corruption within teachers' unions. Landmark has pursued efforts to restrict financial support for non-profits it considers politically motivated without disclosing related expenditures.