  Contemporary events also played an enormous role in prompting philosophical inquiries. Prominent cases of genocide, ethnic cleansing, forms of terrorism uncommon prior to 2001, intensified interest in immigration to affluent developed countries, increased dependence on the labor of those from poor developing countries, and enormous threats to well-being, security and the environment became common catalysts for further work. Philosophers began to reflect on questions such as: Is it ever permissible to engage in coercive military action for humanitarian purposes, such as to halt genocide or prevent large-scale violations of human rights? Can terrorism ever be justified? Should affluent developed countries open their borders more generously than they currently do to those from poor developing countries who would like to immigrate to them? Are our current global economic arrangements fair ones and if not, how should they be transformed? What responsibilities do we have to one another in a globalized, post-Westphalian world order? How should we allocate responsibilities for reducing global injustice in our world, such as in the case of distributing costs associated with addressing climate change?