i believe, and i've written a forthcoming article with my colleague, danny roderick. what we really need is for china and the united states to start basically grouping their relationship into 4 different categories, actions. we agree, we're not going to undertake towards each other. we're not going to try to promote regime change. for example. we agree on certain things should be prohibited. another bucket where we deal with issues by mutual adjustment, we compromise in exchange for them compromising. you can think of arms control or trade negotiations in that category. a 3rd category where we act independently, to protect our interests, but we try to do that in a rather calibrated way. so if china is doing something that affects our interested versus when we respond to it, but we don't escalate and we expect the same behavior from them and response. and then finally those areas where we have to cooperate with others as well. you need multilateral solutions and climate change is the perfect example here, where lots of other parties have interest there as well. i think