@MarshaBradyo
Yes absolutely, he may have declared war anyway.
But as we've seen, once conflict starts it is too late to prevent tragedy. I believe that we should think strategically in order to try to prevent conflicts occurring; recognising that when one state increases its security at the perceived expense of another, it's likely to lead to escalation, and maintaining buffer zones between nations which are historically opposed is just part of that.
We could do all of it, establish genuinely neutral supranational bodies with the power to enforce international laws and norms, achieve multilateral disarmament - and still have armed conflict.
But it must be better to try, rather than simply carry on as normal until the next conflict occurs.