Kelly was born in Günzburg. Her stepfather was a US officer. Her original father and her mother were German. Her family moved to the US in 1959. She went to school in both countries. From 1966 to 1970 he studied political sciences in Washington, D.C.. Kelly campaigned for Robert F. Kennedy in the 1968 U.S. elections. She admired Martin Luther King and was an anti-Vietnam War protester. She graduated in 1970 in Washington and got another exam in 1971 in Amsterdam. Then she returned to West Germany. She worked for the European Commission in Brussels from 1971 to 1983.
She was one of the founders of the Green Party in Germany in 1979 – the first Green Party worldwide. From 1983 to 1990 she was a member of the Bundestag for the Greens. Kelly received the Right Livelihood Award in 1982.
- The Life and Death of Petra Kelly by Sara Parkin, Rivers Oram Press/Pandora, 1995 (Template:Catalog lookup linkScript error: No such module "check isxn".)
- Thinking Green! Essays on Environmentalism, Feminism, and Nonviolence by Petra K. Kelly, Parallax Press, Berkeley, California, 1994 (Template:Catalog lookup linkScript error: No such module "check isxn".)
- Nonviolence Speaks to Power by Petra K. Kelly, online book, almost complete text (also, out of print, published by Matsunaga Institute for Peace, University of Hawaii, 1992, Template:Catalog lookup linkScript error: No such module "check isxn".)
- Curriculum Vitae with picture
- Happiness is a Warm Gun. Film on Petra Kelly's death
- Right Livelihood Award website
- Petra Kelly Archives at the Heinrich Böll Foundation
- Petra Kelly prize for human rights, ecology and non-violence
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