It’s one thing to be told by an incomprehensible chaos theorist that a butterfly flapping its wings in Brazil can set off a tornado in Texas. It’s another to watch chaos theory unfold before your eyes. Carolyn Merchant puts the lesson like this: “The problem as BP has tragically and belatedly discovered is that nature as an active force cannot be so confined.” Predictable outcomes are unusual within ecological systems, while “unpredictable, chaotic events [are] usual”. And just in case we still didn’t get it, a few days ago, a bolt of lightning struck a BP ship like an exclamation mark, forcing it to suspend its containment efforts. And don’t even mention what a hurricane would do to BP’s toxic soup.