How can we raise the levels of trust between people in our societies, our local communities, and our schools?

I find it astonishing that the levels of trust between people vary greatly in different countries. See

http://economix.blogs.nytimes.com/2011/04/18/trust-me-were-rich/

“Within the developed world, Danes are the most trusting people and Chileans the least.

Within the United States, just less than half of people expressed a high level of trust in others.

The relatively egalitarian Nordic countries like Denmark, for example, have high levels of trust. On the other hand, more unequal societies like Mexico and Turkey have relatively low levels of trust.”

Let’s take Fluther as an example of a community. How would you answer the following question?

“Generally speaking would you say that most people can be trusted or that you need to be very careful in dealing with people?”

Yes/no?

What can be done to raise levels of trust in general?

And as an example, How can we raise the level of trust in the online community of Fluther?