Laura Dunn’s brilliant, beautifully shot documentary (produced by Robert Redford and Terrence Malick) isn’t just a parable about a proud real-estate tycoon gobbling up the beautiful land and natural springs around Austin, Texas. It renders the pioneer drive behind the current mortgage crisis as a kind of prototypical American myth. Even in the city — where there’s little nature left to lose — Dunn’s story about communities battling developers will sound more familiar than you might expect.