The concept of WMD is part of numerous national laws and is the core of one of the most important treaties of the United Nations (Organisation for the Prohibition of Chemical Weapons in Convention on the prohibition of the development, production, stockpiling and use of chemical weapons and on their destruction, 1992; United Nation Office of Disarmament Affairs in The convention on the prohibition of the development, production and stockpiling of bacteriological (biological) and toxin weapons and on their destruction, 1975). Yet, the definition of what should be considered a WMD is far from established and subject to controversial debates. Academics, policymakers, and legislators have been introducing a variety of partly conflicting conceptualizations of WMD into scientific debates, public discourse, and legislations over the last eight decades.