Develop Don't Destroy Brooklyn (DDDB) is a volunteer-run and community-funded 501(c)3 non-profit organization founded in February 2004 to oppose Forest City Ratner's 8 million square foot "Atlantic Yards" development proposal for an arena and 16 high-rises in Prospect Heights and Park Slope, Brooklyn. DDDB argues that the $4 billion project would use at least $1.6 billion in public money and would abuse the state's power of eminent domain – taking private property from one owner to give to a private entity for a private use, instead of a public use.
DDDB leads a broad-based community coalition. The coalition consists of 21 community organizations and there are 51 community organizations formally aligned in opposition to the Ratner plan. Over 800 volunteers have registered with DDDB to form various teams, task-forces and committees. They are funded by individual donations and various fund raising events. There have been over 3,500 individual donors, with a median donation of $50.