People may be predisposed to positive social action, but if people are not connected by relationships, networks, or membership in formal or informal organisations, there are limited opportunities for social action and, therefore, limited social capital. If people are not connected, then there can only be unplanned and incidental outcomes, regardless of peoples’ predispositions for social action.
Opportunities for social action come from connectedness (informal and formal) and from knowing. It is not enough to just know people. For there to be strong potential for social action, you need to know how to find or contact them and know about them, including their reputation, what they do, what they can do and know, who they know, etc.