Post-structuralism reacted against the perceived authoritarianism of structuralism. It asserts that language is ambiguous and meanings change, so texts can contain contradictory meanings. Deconstructionists are interested in what lies beneath the surface of a text and the world's influence on a text. They believe meanings are actively created by readers rather than resolved, and inconsistencies may undermine dominant readings. Jacques Derrida introduced deconstruction and aimed to destabilize hierarchies in binary oppositions that privilege one term over another.