Is peace always desirable?

When life gets hectic, and out of hand, peace is important. It is not good to get too stressed.

In math, when you're figuring out a math problem, you want all the numbers to work together peacefully, and easily. Example:

Izzi: You did that problem wrong! It's 4x.
Mara: No, you did the multiplication wrong. It's actually 3x.
Izzi: Nonono, check your math.
Mara:...carry the 1...see?
Izzi:Oh ok you're right.
Mara: *smiles triumphantly*

In this case, you have peace, and everyone is happy. If we had kept fighting and Izzi hadn't admitted that she was wrong, we would not have peace, which is desirable in this situation.

Peace in the stock market, however, is not wanted. It is good for the economy to go up and down, and if it was peaceful, it would be at a stand still and people would not make money.

In music, peace is desirable, so the piece being played sounds nice, and is not blending into an icky mush of incompatible sounds.

In Izzi's case, when she gets on a sugar high and runs around, chasing us and trying to kill us, and the sounds of terrorized shrieks can be heard down the street, peace is definitely desired by us, the chased, but not by Izzi the vicious murderer. She enjoys running down the street, terrifying all she glares at.