This is my January 2016 presentation to the United Nations Commission on Science and Technology for Development as part of their preparation of a report on Smart Cities. The idea of a “Smart City” (or town, or region, or community) is 20 years old; but it has so far achieved comparatively little. The vast majority of Smart City initiatives to date are pilot projects funded by research and innovation grants: there are very, very few sustainable, repeatable solutions yet. This is partly because Smart Cities is usually discussed as a technology trend not an economic and political imperative; and so it has not won the support of the highest level of political leadership, and the widest level of community and citizen engagement. In a few cases where that level of leadership and engagement does exist, however, some cities have shown that existing policy tools and spending streams - such as procurement practises, planning frameworks and property investment - can be been used to create sustainable projects and programmes that can deliver real change.