I don't think the world need policing. At least I don't think it is benefitial. And I don't want the Chinese government in the role as world police as well. Luckily so far they don't seem interested in the job.
Well someone has to at least put up refugee camps to protect civilians fleeing civil war and violence. That's what UN is supposed to do yet Europe still gets flooded with Syrian refugees. Refugee camps should be temporary till nation's stand up and accept some but most nations are only willing to take on some not hundred of thousands.