Despite being a self-declared "Science/Math" person, I am heavily interested in what grouchal termed "Community Studies." Combining this with "Citizenship", Geography, and perhaps Religious Studies would be something genuinely good for the world--connecting people, breaking down barriers.
There are two main components to this project: people and technology. The question is, really, "How do people relate to each other?" By doing an inter-community thing, we would directly address the issue of relationships.