The Achaemenid Empire (558–330 BC) of Persia, popularly referred to as the Persian empire, was a monarchy. It was ruled by a single hereditary leader, who considered himself divinely authorized to hold absolute power.
The Persian empire was a model of efficient ancient administration. The monarch appointed satraps as regional leaders, and delegated power in a way the preserved sufficient local autonomy to prevent most (non-Greek) subjects from wishing to revolt. It had an efficient system of roads and messengers, allowing rule over a large geographic area, and a regular system of taxation that established it on a sound financial footing. It also had a complex and uniform law code.
All of Korea would have been communist and much of what you see today with North Korea would probably have been the state of all Korea had the North won.
It also would have spread communism to a much farther degree and the U.S. would not have South Korea as an ally.
Johannes Gutenberg was most commonly associated with the printing press.