The Aleut Effect demonstrates ergativity is an innovation in the family btw. But I’ve said too much

Nissehatt Mfw Chukotko-Kamchatkan syncretizes ergative with instrumental while IYU syncretizes ergative with genitive

mulher ergativa Yeah actually in Aleut the “relative” case pretty much only does genitive stuff atp. The case system got completely obliterated by sound change and they have to use positional nouns for everything 😢

Nissehatt Itelmen is strangely like Aleut in that, compared to Chukchi-Koryak, it's also morphologically neutral like Aleut is to IYU.