In this article, I offer my observations of the epistemological shifts that have taken place in the TESOL discipline as a result of the inexorable forces of globalisation. Specifically, the article highlights how the multicultural, multilingual, and multimodal nature of communication in the 21st century has disrupted various assumptions on how English is conceptualised, learned, and taught, prompting a shift in disciplinary discourses from a modernist to postmodernist orientation. Readers will gain insights into how the TESOL discipline is increasingly aligning itself with discourses that endorse inclusive plurality, emphasize processes and practices, recognize the role of everyday contexts, promote situated pedagogy, and advocate agency-giving.