What semantic principle underlies ergative-absolutive alignment, and how does studying ergativity challenge the assumption that 'subject' is a universal grammatical category?
Think about your answer, then reveal below.
Model answer: Ergative-absolutive alignment tracks affectedness: the absolutive case marks the argument most directly affected by the event — whether it is an intransitive subject or a transitive object — while the ergative marks the transitive agent as the external causer. This is a coherent semantic grouping distinct from the agent-focused grouping of nominative-accusative. It challenges the universality of 'subject' because what counts as the privileged, unmarked grammatical argument differs across systems. In nominative-accusative languages, agenthood plus intransitive subjecthood define the subject category. In ergative-absolutive languages, this familiar 'subject' does not exist as a unified category — agents are ergative while intransitive subjects pattern with objects. Grammatical categories are language-specific design choices, not universal features of human grammar.
This is why linguistic typology is theoretically important, not just descriptively interesting. Ergativity reveals that concepts like 'subject' and 'object' that seem self-evident in European languages are actually one solution among multiple possible solutions to the problem of organizing clause arguments. It also connects to argument structure theory, case theory, and the semantics of events — a single phenomenon that illuminates how morphology, syntax, and semantics interact across languages.