Organizing is a collaborative effort. Hard to say, from my view, that any individual organizer accomplishes anything as a personal "accomplishment;" unless we're talking about salary level, title, or award. There are parks and schools that organizations I worked for opened or saved. There's health care equipment that came sooner than it might have. There are State and local laws that were passed or blocked. Would take more than 150 words for thirty years and you'd have to have a debate on responsibility and desirability.