There are two major forces of oppression in human society. The political and the economic.
US style libertarianism fails to address economic oppression in any way. That's it's fatal flaw. The state is merely a tool of economic forces so it really addresses nothing at all and is basically an astro-turf ideology being used to instill acceptance of policy conducive to large corporations because of this. If people are truly concerned about human liberation they are going to have to dig much to deeper depths than that covered by US style libertarianism.
There's nothing radical or revolutionary about the school of thought whatsoever.