this article illustrates how the term 'dual use' roots in a distinction between ‘peaceful’ and ‘non-peaceful’, or ‘civil’ and ‘military’ uses, and has gradually become associated with a broader dichotomy between ‘legitimate’ and ‘illegitimate’ purposes. Historically, this duality served not only to articulate the risks posed by certain technologies and indicate the rationale for their export control but also to justify their trade.