I always saw BNW as a rather conservative novel, in the old style of conservatism of course.
Old-fashioned British conservatives like, say, Tolkien and Lewis, were skeptical of all sorts of modernisms, whether socialist or capitalist or moral or technological. BNW hits at many targets.
What a screenwriter will do with that is pretty much up to the screen writer.
Is this the story where he ends up in Mexico and is saved by his Mother who has been living as a native for quite a while? This may be the spin as the natives are the smart ones.