I am trying to work out where in the world people have really changed the way they interact with their environment, either at regional (e.g., country-wide) or local scales (e.g., a town, community). I know that individual people can change the way they manage their backyard, but where has this behavioural change been effectively scaled up? Also, has change been gradual or radical? And what theories underlie such societal changes? All insights welcome.