Abstract
Many philosophers have recently become interested in conceptual engineering, or the activity of producing better conceptual schemes in human populations. But few, if any, are asking the question: what would it mean for actual human agents to possess the social authority to modify a conceptual scheme in this way? This paper argues for a deontological approach to conceptual engineering, wherein we have to secure social authority qua engineers before attempting to modify social concepts. I show that the dominant, consequentialist conception of engineering violates basic rights that concept-users have, particularly over their own identity-constituting concepts. Using examples from the philosophy of race and sexuality, I show that conceptual engineers cannot authoritatively modify social concepts if they employ consequentialist reasoning about those concepts.