English Linguistics 36: 1 (2019) 93–102 © 2019 by the English Linguistic Society of Japan * This review is supported in part by JSPS KAKENHI Grant Number 16K02757. －93－ [Rൾඏංൾඐ] Concepts, Syntax, and Their Interface: The Theta System By Tanya Reinhart, ed. by Martin Everaert, Marijana Marelj and Eric Reuland, MIT Press, Cambridge, MA, 2016, xvi+262pp. Tൺ඄ൾඋඎ Sඎඓඎ඄ං Tokyo Gakugei University* Keywords: θ-features, reduction, unaccusative verbs, Experiencer verbs, the accusative case 1. Introduction In Concepts, Syntax, and Their Interface: The Theta System (CSTI), Reinhart explores far-reaching theoretical implications of a particular sys- tem of the lexicon, namely, the Theta System (hereafter, TS), in which traditional θ-roles are decomposed into θ-features: [c] (cause change) and [m] (mental state involved). Introducing a ‘causative’ feature might not first appear to readers to be illuminating, given the abundance of its vari- ants, say, the Chomskyan syntactic v and the Jackendovian lexical seman- tic CAUSE. However, while v and CAUSE are part of many attempts to derive θ-roles or eliminate them, CSTI is distinguished from them for its opposite direction of approach. CSTI is based on θ-features and attempts to derive effects related to them and to answer outstanding questions con- cerning θ-roles and the accusative case, among other topics. These include a question as to the defining properties of unaccusative verbs (sections 2–3), questions as to how to establish inferences without stipulating independent semantic representations (section 4), and long-standing problems centering around Experiencer verbs and the accusative case (sections 5–7). CSTI consists of three chapters, the first of which is the core of the monograph, namely, Reinhart’s paper on the TS. This was originally ac- cepted for publication in Linguistic Inquiry, and then scheduled for pub- lication in the Linguistic Inquiry Monographs series, but then it remained