A presentation conducted by Professor Nick Tyler CBE, Chadwick Professor, Civil Engineering, University College London, United Kingdom. Presented on Wednesday the 2nd of October 2013. Brundtland famously said that sustainability is about meeting the needs of the present without compromising the needs of future generations. This seems reasonable enough, but what will be the ‘future generations’ needs? The search for that outcome means a complete rethink of how we think about the infrastructure that supports a city – including the social, as well as the ‘hard’, infrastructure that enables a city to survive. Unsurprisingly many countries and cities are thinking about this problem but the increase in future well being will need new thinking, new approaches and new substance.