At the timid age of 17, Terry Pratchett wrote a fantasy novel called The Carpet People, and it was published, just in case you haven't been blown away by this already, let me tell you that this is a Very Impressive Accomplishment. In his own words, it sold a bit, and then went out of print, and years later, when people started being impressed by the quality of Pratchett's work instead of by the simple fact that he was being published, they started asking for it. Mr. Pratchett took the book down from wherever he had kept it, and said (I'm quoting this incorrectly) "Wait a minute, I wrote this book when I thought fantasy was about kings and battles, now I think fantasy should be about how not to have kings and battles." So he rewrote the book, and it's been published/reissued.
Plainly speaking, this book is about a bunch of infintesimally small people who live on a carpet, whole societies have evolved, empires have risen and fallen, the most ordinary objects, dropped onto the carpet and forgotten there become magical lands, homes and sources of industry to the molecullar inhabitants of The Carpet. This is the story of Snibril, one of the Munrungs (or in their language The Real Human Beings) and how he and his tribe join the Doomi empire to fight the Moules (or in their language The Real Human Beings) who live in the deepest recesses of the Carpet. It is impossible to describe how TRUE Pratchett's idea's are about war and about making your own choices. If I were a better writer, I could describe how happy this book made me, how magnificent it is. But as I am not, you're just going to have to take my word for it, or read the book.