sorry to be a pedantic twat but wgc was a product of the early 20th century garden city movement under ebeneezer howard and was begun in the 1920s. the garden city movement had a specific ideology and intended to create a utopian vision where industry, agriculture and habitation combined to make beautiful, human scale settlements free from the cramped, polluted cities of the day.
the 1950s-1970s post war experiments had very different ideas of what constituted utopian vision and created quite different settlements.