It is not uncommon to encounter people who think and talk about the world so differently from the way you do that it’s not really possible to put yourself in their shoes. But such systems of representing the world are not truly alien – they still involve terms that pick out objects, properties, and other elements found in familiar languages and metaphysical theories. 

In Alien Structure: Language and Reality (Oxford University Press, 2024)), Matti Eklund considers whether there are ways of representing the world that are completely alien in both linguistic and metaphysical structure, and which may capture reality better (on an ontological realist view) or which might show the limits to “anything goes” (on an ontological relativist view). Eklund, who is professor of philosophy at Uppsala University, defends the value of considering these possibilities and links his discussion to conceptual engineering, philosophy of quantum mechanics, and other contemporary philosophical debates.