...negotiating partner on matters of shared concern, be it transboundary pollution, climate change or trade, requires a response, and certainly one response is to resort to unilateral measures. Reciprocal unilateralism in its best light, and the one the authors emphasize, is a short
term strategy; a form of tit-for tat that serves to bring an uncooperative partner back to the table. As a long
term strategy, however, unilateralism lacks predictability and, ultimately, it lacks any transformative potential to create a shared normative vision regarding common threats to the natural environment....