The Dirk and Linus show comes to Seoul

Doing is caring. I think Linus contradicts himself a bit here: he claims he is not a very caring person, but he is still proud of the two projects which changed the world, he supports EFF and keeps working on kernel not by writing code but by serving the developer community as a project manager.

In addition to an operating system kernel, Linux is a truly open research/study platform for the mankind, which meets the criteria for a bigger cause in my opinion.