Opinion is called the queen of the world; it is so, for when reason opposes it, it is condemned to death. It must rise twenty times from its ashes to gradually drive away the usurper.
If we are willing to act violently in pursuit of a peripheral interest, everyone can be certain that, when a vital interest is at stake, we will be still more violent. 'Credibility' is defined as the willingness to kill a lot of people now for a not very good cause to assure the world that we'll kill a lot more people if we can find a better one.
And as we are - the world is. That is, if we are greedy, envious, competitive, our society will be competitive, envious, greedy, which brings misery and war. The State is what we are.