The Corporation was determined to learn from the mistakes made in the earlier new towns and revisit the Garden City ideals. They set in place the characteristic grid roads that run between districts, the Redway system of independent cycle/pedestrian paths, and the intensive planting, lakes and parkland that are so appreciated today. Central Milton Keynes was not intended to be a traditional town centre but a business and shopping district that supplemented the Local Centres in most of the Grid Squares. This non-hierarchical devolved city plan was a departure from the English New Towns tradition and envisaged a wide range of industry and diversity of housing styles and tenures across the city. The radical grid plan was inspired by the work of Californian urban theorist Melvin M Webber (1921–2006), described by the founding architect of Milton Keynes, Derek Walker, as the city's "father". Webber thought that telecommunications meant that the old idea of a city as a concentric cluster was out of date and that cities that enabled people to travel around them readily would be the thing of the future, achieving "community without propinquity" for residents.