Eco-terrorism usually refers to acts of violence or sabotage committed in support of ecological, environmental, or animal rights causes against persons or their property.

Eco-terrorism is defined by the Federal Bureau of Investigation as "the use or threatened use of violence of a criminal nature against people or property by an environmentally oriented, subnational group for environmental-political reasons, or aimed at an audience beyond the target, often of a symbolic nature." The FBI has credited to eco-terrorism 300 million dollars in property damage from 2003 and 2008, and a majority of states within the USA have introduced laws aimed at these activities.

Critics of this use of the term argue that it has been defined in order to vilify activists, and that the term would be more properly employed to describe the environmentally damaging activities of corporations.

Eco-terrorism is a form of radical environmentalism that arose out of the same school of thought that brought about deep ecology, ecofeminism, social ecology, and bioregionalism. Eco-terrorism is a controversial term.

Paul Watson (born December 2, 1950) is a Canadian animal rights and environmental activist, who founded and is president of the Sea Shepherd Conservation Society, a direct action group devoted to marine conservation.

The Toronto native joined a Sierra Club protest against nuclear testing in 1969. He was an early and influential member of Greenpeace, crewed and skippered for it, and later was a board member. Watson argued for a strategy of direct action that conflicted with the Greenpeace interpretation of nonviolence, was ousted from the board in 1977, and subsequently left the organization. That same year, he formed Sea Shepherd Conservation Society. The group is the subject of a reality show, Whale Wars.

He also promotes veganism, voluntary human population control, and a biocentric, rather than anthropocentric, worldview.

Paul Watson was born in Toronto to Anthony Joseph Watson and Annamarie Larsen, and grew up in St. Andrews, New Brunswick. After working as a tour guide at Expo 67, the World's Fair that took place in Montreal in 1967, Watson "rode the rails" in boxcars west to Vancouver.

John Peter Sarsgaard (pronounced /ˈsɑrzɡɑrd/; born March 7, 1971) is an American film and stage actor. He landed his first feature role in the movie Dead Man Walking in 1995. He then appeared in the 1998 independent films Another Day in Paradise and Desert Blue. That same year, Sarsgaard received a substantial role in The Man in the Iron Mask (1998), playing Raoul, the ill-fated son of Athos. Sarsgaard later achieved critical recognition when he was cast in Boys Don't Cry (1999) as John Lotter. He landed his first leading role in the 2001 film The Center of the World. The following year, he played supporting roles in Empire, The Salton Sea, and K-19: The Widowmaker.

For his portrayal of Charles Lane in Shattered Glass, Sarsgaard won the Online Film Critics Society Award in the category for Best Supporting Actor and was nominated for the 2004 Golden Globe Award for Best Supporting Actor. Sarsgaard has appeared in an eclectic range of films, including the 2004 comedy Garden State, the biographical film Kinsey (2004), the drama The Dying Gaul (2005) and big-budget films such as Flightplan (2005), Jarhead (2005), Orphan (2009), Knight and Day (2010), and the superhero film Green Lantern (2011).