Other periods of peace have shown up in history when one empire is the undisputed hegemon of the known world. The pax brittanica is another example, as are seve

Other periods of peace have shown up in history when one empire is the undisputed hegemon of the known world. The pax brittanica is another example, as are several periods in Chinese history. We are living in the pax Americana right now, but it is unclear how long that will last.