In the example of the APA coalition in Pittsburg, some possible reasons for the coalition's failure ...

In the example of the APA coalition in Pittsburg, some possible reasons for the coalition's failure
  were:
 
  a) The groups involved had too narrow of a focus and the coalition did not have an effective
  communications plan internally or externally.
  b) The coalition was chronically underfunded and this lack of funds promoted loss of enthusiasm
  and morale.
  c) Getting involvement from member organizations was difficult and there were internal staff and
  volunteer conflicts.
  d) There was no strong, effective leadership and the conservative members who provided most of
  the funding for the coalition withdrew.