This publication is the result of a year-long dialogue between David Chipperfield and Simon Kretz. Its aim is to positively affect the future of urban developments, providing a manifesto for a relational, collective and diverse future for our cities. Using the Bishopsgate goods yard site in East London as a case study, this project highlights the conditions under which an ideal urban development project could flourish. The conclusions reached through this exercise demonstrate how future large-scale developments elsewhere could have more positive urban impact, both at the scale of the neighbourhood and the wider metropolis.