The wars in the world won't stop unless the powerful state won't stop thinking to exercise their authority on the weak countries. They build the weapons to test on the weak countries - like we have witness so many examples in the history where the weak suffered and powerful ruled.
It's quite necessary to have some nations build more and more military strength, just so they can keep the other countries in check in terms of abusing their might against small and weaker countries. But what the US, Russia, China, and other countries are doing on weaker countries are just plainly unacceptable, but they are also the only ones that will stave off one another when they cross a certain 'line'.
Unfortunate for citizens who are stuck with the decisions of their government heads that they know nothing about, but what can they do really?