[meri_dian]

As others have said, having a superpower keeps the peace. Multipolar worlds tend to be ridden with conflict.

[pishpash]

Neither a unipolar world or a multipolar world is inherently more or less peaceful. Peace comes when you get used to living in a certain world and accept your position. Conflict happens in transitions to such acceptance.

[meri_dian]

When there is unipolarity, the superpower can enforce the status quo. Which produces certainty.

When a superpower exists, the order of power is clear. Thus a nation has little choice but to accept its position.

So according to your own definition wouldn't you agree that unipolarity produces peace?