The Earth Liberation Front (ELF) is an environmental activist group that originated in the United Kingdom in the late 1990s. It is known for its direct action tactics, which often include property damage aimed at corporations and organizations perceived to harm the environment. ELF operates as a decentralized movement, meaning there is no formal leadership or membership, allowing individuals to act independently under its banner. The group's actions are motivated by a belief in the urgent need to protect the planet from ecological destruction. ELF has been linked to various high-profile incidents, including arson and vandalism against logging companies and research facilities. While supporters view ELF as a champion of environmental justice, critics label it as a domestic terrorist organization due to its illegal activities.