Rome 4

campaign to save open space: not just distant wilderness areas but also local forests and farms
different kinds of nature that we might want to save;
chicago metropolitan area population

spaces like marshes and steep hillsides that had previously been left undeveloped were now being used for housing developments as well
older neighborhoods often had parks but the new subdivisions usually did not
quote about bulldozers
Three arguments:

amenity (how your neighborhood looks)
outdoor recreation
Whyte's Last Landscape book cover

William Whyte was a key advocate for open space, with practical suggestions

other ideas

What worked at least in some areas:

present day version