With respect to previous policies of supporting China's international growth in acceding to organizations like the WTO, maybe some politicians thought that China joining the WTO would bring about liberal democracy. Negotiators didn't. I think what we hoped for from this was perhaps a somewhat better system of commercial law. China's accession to the WTO has benefited both sides. It has benefited companies in the sense of reduced tariffs. While we're not completely happy with how China implements or doesn't implement some of its obligations, it has substantially changed China's trading system—if you compare it to the way it was in 2000 and then the way it was afterwards—in a positive way.
I wouldn't agree with your statement. When we say we can't go back to the way it was before, it doesn't mean we don't want to engage China in some new way. We need to work with China and its presence in the international community. Yes, we have to be firm, but we have to be intelligent about how we engage China and choose where our interests lie and where we can work with China internationally and where we collide with our interests.
In the case of human rights, if we're going to articulate human rights concerns, lecturing is not effective. It sometimes is necessary, but we should be also giving a business case for it.