Center for Biological Diversity 

Center for Biological Diversity
(1989; Tucson, Arizona; 160 staff;

Is a nonprofit environmental activist and legal advocacy organization known for working through science, law and creative media to secure a future for all species hovering on the brink of extinction. Its strategy consists of filing “relentless lawsuits” seeking stricter enforcement of the Endangered Species Act (ESA), the Clean Air Act and other federal environmental laws, most often by petitioning to list new species on the ESA or enforcing those already listed. It is based in Tucson, Arizona, but has 16 additional offices throughout the U.S. The center has gradually expanded its species-saving tactics to include protecting rivers, stopping urban sprawl, battling overgrazing and even tackling climate change. It claims to have approximately 1.1 million members and online activists.



  • The Revelator: an online news and ideas initiative providing editorially independent reporting, analysis and stories on current and interesting topics.
  • Pop X: a monthly e-publication examining the connection between unsustainable human population, overconsumption and the extinction of plants and animals around the world.

Leadership: Kieran Suckling (Executive Director)
Budget: $ 20m

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