By 2030, there will be 8.3 billion people on Earth. This presents a unique challenge in terms of provision. Such a massive, largely urban, population will only be able to be accommodated in expansive megacities. Such a development needs to be supported by advances in the art, science and processes of manufacturing. Deploying those abilities will also require us to shrug off the dogma of sustainability that insists only small can be beautiful. Humanity has come a long way since the first modular megastructure was built at Ur, in what is now Iraq. Eco-zealots argue against the mechanised megaforming of landscape and the modularised production of megastructures. Is this very caution and sense of tact, however, in danger of us denying a portion of the world's population much needed housing?