I have no horse in this race. I will be voting Libertarian in November.
With that being said, I have been dismayed at the number of times that participating as a community organizers has been dismissed at not being significant service.
Personally, I think the less government there is and the more community activism there is, it is better for all.
Community organizing can be loosely defined as [via wiki]:
a process by which people are brought together to act in common self-interest or to help others. While organizing describes any activity involving people interacting with one another in a formal manner, much community organizing is in the pursuit of a common agenda. Many groups seek populist goals and the ideal of participatory democracy. Community organizers create social movements by building a base of concerned people, mobilizing these community members to act, and developing leadership from and relationships among the people involved.
Community organizers act as area-wide coordinators of all the programs of different agencies so as best to meet community needs for health and welfare services. They also facilitate self-help programs initiated by local common-interest groups, for example, by training local leaders to analyze and solve the problems of a community. Community organizers work actively, as do other types of social workers, in community councils of social agencies and in community-action groups. At times the role of community organizers overlaps that of the social planners.
Here is a list of a few of my favorite community organizers: