"One of the ironies of World War I was that in a war 'to make the world safe for democracy,' the government attacked the civil liberties that make democracy possible."

Question

I don't know what you're supposed to do with that (quotation?), but the search results below have lots of interesting information in them:

http://www.google.com/search?q=ww+i+civil+liberties&rls=com.microsoft:en-us:IE-SearchBox&ie=UTF-8&oe=UTF-8&sourceid=ie7&rlz=1I7SUNA

=)

what caused World War I?