Greenpeace is an independent global campaigning network, founded in Canada in 1971 by Irving Stowe and Dorothy Stowe, immigrant environmental activists from the United States. Greenpeace states its goal is to "ensure the ability of the Earth to nurture life in all its diversity" and focuses its campaigning on worldwide issues such as climate change, deforestation, overfishing, commercial whaling, genetic engineering, and anti-nuclear issues. It uses direct action, lobbying, research, and ecotage to achieve its goals.

The network comprises 26 independent national/regional organisations in over 55 countries across Europe, the Americas, Africa, Asia and the Pacific, as well as a co-ordinating body, Greenpeace International, based in Amsterdam, the Netherlands.

The global network does not accept funding from governments, corporations, or political parties, relying on three million individual supporters and foundation grants. Greenpeace has a general consultative status with the United Nations Economic and Social Council and is a founding member of the INGO Accountability Charter, an international non-governmental organization that intends to foster accountability and transparency of non-governmental organizations.

Greenpeace is known for its direct actions and has been described as one of the most visible environmental organisations in the world. It has raised environmental issues to public knowledge, and influenced both the private and the public sector. The organization has received criticism; it was the subject of an open letter from more than 100 Nobel laureates urging Greenpeace to end its campaign against genetically modified organisms (GMOs). The organisation's direct actions have sparked legal actions against Greenpeace activists, such as fines and suspended sentences for destroying a test plot of genetically modified wheat and, according to the Peruvian Government, damaging the Nazca Lines, a UN World Heritage site.