The other day I made a (small) donation to Wikipedia. (This is actually my second donation).
In a little questionnaire that followed was a little box, where I could write my reasons for donating.
Here is what I wrote there:
Personally I support the idea of "free information for all" and think that it should be put forward, that knowledge (in general) should not be the "property" (copyrighted) of any single person/organization/company/country. Knowledge makes free. THAT is something this world really needs. Now more than ever."