Alterity, from the Latin alter (other), is a central concept in phenomenology and ethics. Husserl's analysis of intersubjectivity asks how I can know another consciousness, given that I have direct access only to my own experience. Heidegger's being-with (Mitsein) treats alterity as a structural feature of Dasein's
existence. But it is Levinas who makes alterity
the foundation of ethics: the Other's face makes an infinite, asymmetrical demand on me that I cannot reduce to my own categories. The Other is not a version of
myself; their radical difference (alterity) is precisely what generates ethical
obligation. Bakhtin's concept of the dialogic — meaning as produced through
the encounter of different voices — extends alterity into language and
poetics. For poets, alterity is the
challenge of genuinely representing the other without appropriation. Related terms: the Other, intersubjectivity, the face (Levinas), dialogism, hospitality, otherness.