Michael Pollan's novel, The Botany of Desire, adapted to a film last year, was recently added to Netflix Instant. He turns upside-down the notion that humans have manipulated plants (specifically apples, tulips, marijuana, and potatoes) to their advantage. In fact, these plants have been using us for thousands of years to develop and proliferate.
It's pretty fascinating, even if Michael Pollan can be a little grating at times.
Botany of Desire on Netflix Instant