According to Simon Dalby, Professor emeritus in the Balsillie School of International Affairs at Wilfrid Laurier University in Ontario, Canada, global politics over the past 70 years has been driven by an overabundance of "firepower," both nuclear and carbon-based.  The first was used by Great Power to threaten incineration of the world, by intention or accident, in the name of "national security."  The second now threatens the future of life on Earth--human and nonhuman--but Great Powers (and the not-so-great) resolutely refuse to give them up in the name of "national security" and "lifestyle."  In 2022, Dalby published Rethinking Environmental Security, an analysis of firepower past, present and future.  Join host Ronnie Lipschutz for a thought-provoking conversation with Simon Dalby about these two threats and what countries are not doing about it. Previous shows are available at https://ksqd.org/sustainabilitynow/ Sustainability Now! is underwritten by the Sustainable Systems Research Foundation.