“Peace is more than the absence of war, more than the maintenance of balance of power between enemies. It is more than the firm hold of a dictator that, for the moment, involves no bloodshed. But then, what is peace?  

“Peace is the result of justice. When society is rightly ordered, when people live as God intends, then peace reigns. Peace must be constantly built up. Human nature must be called again and again to make peace.  

“But even this is not sufficient. Peace comes, in the end, from love.  

“When we love our neighbor, even those who irritate us or alienate us, then we give peace its only chance. Unless people willingly come together to share their talents and bright minds, peace cannot be achieved.” 

From Gaudiem et Spes, Vatican II