This article provides a brief overview and commentary on theoretical approaches discussed in the articles by Einarsen, Liefooghe and Olafsson, and Rayner in the theoretical section of this special issue. In highlighting the difficulty in defining bullying, this article suggests that definitional boundaries ought to be all encompassing and open for discussion as a way of further developing the debate about workplace bullying. A discussion of methodological approaches, including those used by the authors in the theoretical section then follows. The article suggests that a collaborative approach between employers and researchers would help further address the problem of workplace bullying.