ilan, if you haven't already, watch a whole bunch of documentaries (perhaps even on similar social issues as yours), and contact one of the producers of a film that you really like. tell them about your project and you just might be able to bring them aboard as an Executive Producer. (of course, make sure that they are not just a "name", but that they can actually do something tangible for your project.)
documentary producers/directors are ridiculously easy to contact (compared to their counterparts in the fiction world). for my last project, i contacted Davis Guggenheim out of the blue, and ended up having an hour-long, face-to-face conversation with him at his office. he didn't end up being my EP, but you just never know.