I wouldn't get into politics for the discussion but we can start living peacefully through our homes and with our lives. The way you handle complicated things will help you to maintain that peace which shall not be gone in hard times when they come.
IMHO, to cause war is not to cause peace, if there's always a war, peace is hard to find. But abandoning mass weapons? no strong country will do that.
If people avoid discussing about politics then it is easier for the leaders to execute anything what they wanted and most of the time it will be done for their benefits not for ours.And in democracy it is necessary to know all the things happening around us.Sometimes wars can bring peace to us but not in the modern economic world because here everyone can go anywhere and do what they want if they are capable of.
We have different ideology about war. Like what you have said, others are believing that it can bring peace.
And some, don't believe that it's the only way to bring peace. Because with wars, it brings casualties, collateral damages, deaths, starvation and other bad experiences that will bring to the people that are actually on the ground.