1900s
- 1963: President of the USA John F. Kennedy assassinated by Lee Harvey Oswald, although a conspiracy is strongly suspected, with evidence linking the CIA, Mafia and USSR in his assassination.
- 1972: Shirley Margaret Brifman, a sex worker who attempted to expose police corruption in Australia died in suspicious circumstances.
- 1975: Juanita Nielsen, a journalist and activist based in Australia was killed by an unknown person after attempting to expose police corruption and for her public support of the Green Bans.
- 1984: Hilda Murrell, an anti-nuclear activist based in the UK was abducted and murdered by unknown individuals.
- 1988: Chico Mendes, a trade unionist, socialist and environmentalist based in Brazil, was murdered by logging companies.
- 1995: Jeanette Kawas, an environmentalist based in Honduras, was murdered by two unknown men.
2000s
- 2003: Jane Tipson, an environmentalist and animal rights activist trying to stop the use of dolphins in theme parks in Saint Lucia was assassinated by an unknown group, it is alleged the construction company hired a hitman and bribed the police.
- 2004: Charoen Wat-aksorn, an environmentalist and human rights defender based in Thailand, was shot after exiting a bus by unknown people.
- 2011 (failed): Máxima Acuña, a farmer and environmentalist based in Peru and her daughter were nearly murdered for their opposition to mining.
- 2016: Berta Cáceres, an environmentalist and indigenist based in Honduras, was murdered in her home by an unknown person, but suspected to be a hitman.