Certainly there are many concerns on Earth that must be addressed if mankind hopes to survive. Pollution and climate change are real threats that deserve a great deal of attention from all governments around the world, since everyone is affected. This attention, however, does not need to exclude from the agenda the development and propagation of manned space flight. Rather, states can focus on more than one science-based issue at a time. It is rather disingenuous, in fact, to suggest that it is a matter of one or the other. Furthermore, the international unity created by manned space exploration, binding people not as members of separate nations, but as members of the human race, can serve as a means of promoting unified action on issues affecting the whole planet. Space exploration can thus actually help to ameliorate coordination problems between states in their efforts to deal with global issues. Clearly, when people think of themselves as citizens of the world they are more ready to think globally and consider issues affecting other countries. Space exploration is very real means of promoting such thinking.