It is not simply the absence of conflict. Peace is not compromise with that which is wicked or evil. This is the pathway of surrender and slavery. It is not meekly submitting to error nor refusing to stand for what is right. The biblical concept of peace 1.
Peace carries the idea of total well-being of mind and heart and body.
It implies a complete contentment of soul. This complete peace comes from our submission to God and His will. We should realize that conflict and war has at its root our rebellion against God. Man was at peace with both himself and with his creator before sin entered the world. After that mankind had conflict against God, and with each other, ever since.