The concept of Public Interest Litigation (PIL) originated and developed in the USA in the 1960s. In the USA, it was designed to provide legal representation to previously unrepresented groups or interests.
In the nineteenth century, various movements in that country have contributed to public interest law, which is a part of the legal aid movement. The first legal aid office was established in New York in 1876. In the 1960s, the PIL movement began to receive financial support from the office of economic opportunity.