In this article we (a) argue that mainstream composition studies is at present too narrow in its scope and limited in its perspective and (b) offer some thoughts, from our unique interdisciplinary position, that we feel could help mainstream composition professionals improve this situation. In our article, we first provide evidence that we feel suggests an unfortunate pattern of neglect in mainstream composition studies of writing in English as a second language (ESL) and writing in languages other than English. We then introduce a number of concepts from second language studies (primarily from second language acquisition and second language writing instruction) that we believe could help mainstream composition studies address its limitations; develop a more global and inclusive understanding of writing; and thus avoid being seen as a monolinguistic, monocultural, and ethnocentric enterprise.