What does ecoterrorism mean?
Ecoterrorism refers to violence, sabotage, or the deliberate destruction of property carried out by individuals or groups in the name of environmental protection. The term combines 'eco-', from the Greek oikos meaning house or environment, with 'terrorism', and emerged in the late twentieth century as radical environmental movements grew more confrontational. Acts described as ecoterrorism have included arson, tree-spiking, and attacks on laboratories, logging operations, and construction sites. The word is strongly pejorative and politically loaded: governments and prosecutors use it to classify certain crimes as terrorism, while many environmental advocates argue it unfairly conflates property damage with genuine terror against people. Related terms such as ecotage and monkeywrenching describe similar actions without the same stigma. Understanding ecoterrorism therefore requires attention not only to what was done but to who is doing the naming — the word sits at the intersection of criminal law, activism, and public rhetoric about how far one may go to defend the natural world.
nounThe use or threatened use of violence, sabotage, or destruction of property by individuals or groups in support of environmentalist or ecological causes.
- Violence, sabotage, or destruction of property committed in furtherance of environmental or ecological causes.
"The group's arson attacks on logging equipment were widely condemned as ecoterrorism rather than legitimate protest."
"Federal prosecutors charged the cell with ecoterrorism after a string of arsons at SUV dealerships and construction sites."
"Critics warned that labeling nonviolent tree-sits as ecoterrorism blurred the line between protest and crime."
Rarely pluralized; the word functions almost exclusively as an uncountable mass noun referring to the phenomenon as a whole.
"Historians have studied the various ecoterrorisms of the late twentieth century across different countries."
Though it sounds modern, the FBI was formally investigating 'ecoterrorism' decades before most people had ever heard the word — and some activists argue the label itself was invented to criminalize civil disobedience.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of ecoterrorism
Ecoterrorism is a twentieth-century English compound formed from 'eco-', derived from the Greek oikos ('house, habitat'), and 'terrorism', which traces through French terreur to the Latin terrere ('to frighten'). It arose in the late twentieth century, particularly in the United States, as authorities and commentators sought a label for violent or destructive acts committed by radical environmental groups. Its cognates share either root: words like ecology and ecosystem from the Greek element, and terror, deter, and terrorize from the Latin.
Related word forms
How ecoterrorism is actually used
The term is inherently pejorative and politically contested: law enforcement and critics apply it broadly, while many environmental activists reject it, reserving terms like 'direct action' or 'ecotage' for property-only acts. It is largely a late 20th-century coinage, common in North American legal and media discourse. Because of its charged nature, careful writers often specify what actions are being described.
Easily confused with ecoterrorism
Ecotage refers specifically to sabotage carried out for environmental reasons, while ecoterrorism is the broader term that includes violence and threats against people as well as property.
Monkeywrenching is a slang term for covert environmental sabotage of equipment, whereas ecoterrorism is the formal, often legally charged label that carries a stronger connotation of terror tactics.