I elucidate a frame of mind that David Wiggins callsrespect for nature, which he understands as a special attitude toward asui generisobject, Natureas such. A person with this frame of mind takes nature to impose defeasible limits on her action, so that there are some courses of action that she will refuse even to entertain, except in circumstances of dire exigency. I defend the reasonableness of respect for nature, drawing upon considerations in Wiggins's work. But I argue that the natural (...) systems that comprise the proper object of respect for nature are notsui generis; they are kindred, for practical reason, to complex social, political, and economic systems that we inhabit. I argue that it is reasonable to treat all such valuable systems with a similar respect, and that this respect is continuous with the respect we owe to persons and to valuable objects more generally. In all of these cases, respect consists, in part, in a disposition to defeasible constraints on practical deliberation. (shrink)