But if life at the hinge requires sacrifices, that does not mean that life at other times can be laissez-faire. It doesn’t absolve us of all responsibility to the future. This century we could still do remarkable damage, and it needn’t be as catastrophic as a species-ending event. Over the past century, we have found myriad new ways to leave malignant heirlooms for our descendants, from carbon in the atmosphere to plastic in the ocean to nuclear waste beneath the ground.
