In this talk, Justin Coon explores the issue of complexity in the IoT from a fundamental perspective and provide some insight into what this means for practical deployments in the future. The evolution of wireless communication technology over the past two decades has led to severe engineering challenges concerning interference and network densi cation. As we begin to embrace the Internet of Things (IoT) paradigm, these challenges are sure to grow. Indeed, it is predicted that connection densities will surpass one million per square kilometre in the near future, largely owing to the deployment of IoT networks and services. Yet, relatively little has been done to quantify the growing complexity of these networks, and the subsequent implications that this growth will have on network performance.