"Social capital"

According to some theories, the development (or not) of a society depends much if its "social capital", the tendency for people to trust each other and being capable of join with others for collective activities. Some objections can be made about these theory, but is not about these point that I want to talk about in these post. It is about an idea that I had - perhaps we can make a prediction about the "social capital" of a given society looking to the cultural stereotypes about that society. More in detail: a) If in a society the people has the reputation of being cold, distant and aloof, much probably it is a society with high "social capital", with much civic participation and many voluntary associations b) If in a society the people has the reputation of being warm, talkative and sociable, much probably will be a society with low "social capital", where people have munch difficulty in joining together to do anything.