At its inception, the paradigm of SD was deliberately made distant from that of OR. Yet developments in 'soft' OR and systems theory now have much in common with current SD modelling practice. This paper briefly traces the parallel development of SD and soft OR and argues that a dialogue between the two would be mutually rewarding. To support this claim, example of soft OR tools are described along with some of the field's philosophical grounding and current issues. Potential benefits resulting from a dialogue are proposed, with particular emphasis on the methodological framework of SD. The paper closes with some suggestion on how to begin learning from the links between the two fields.