This book explores the syntactic nature of inner aspect from a minimalist perspective.It begins with the new observation that there are two independent properties at play in English inner aspect: the object-to-event mapping and event structure.From a discussion of English statives and Russian, it is concluded that the former property is variant and the latter universal; a minimalist conception of language variation arises naturally in this context.Additionally, an exploration of a lexical derivational approach to achievements leads to the expectation that there are no accomplishments in the lexicon.A detailed look at idioms suggests that this expectation is met.These results support the division of labor between an operative lexicon and narrow syntax in aspectual composition; this naturally poses a problem for (neo-)constructional approaches to inner aspect.Finally, one conclusion reached about the syntactic nature of inner aspect regards the object-to-event mapping: it is a purely syntactic phenomenon.