World Bank views on Social Capital

Before the paper shifts to a focus on the details of the "social capital assessment tool," there is an very interesting discussion of social capital (and of the challenges that are encountered by those trying to get a handle on the concept) at
SOCIAL CAPITAL ASSESSMENT TOOL

One particularly noteworthy passage:

What is social capital in one context can be unsocial [their emphasis] capital in another. The Church that supports brotherhood and peace in one context becomes a forum for armed militancy in another. Unions that may promote coordination and cooperation with the state in a corporatist context can wage bitter confrontation in another context.

At the risk of being ridiculous (hasn't stopped me before), I will confess that the difficulties in nailing down just what should be meant by "social capital" do remind me of pre-Newtonian struggles to come up with an effective definition for "mass."