Third Estate Empire

The protagonist travels to the Middle Ages. At this time, the kingdom is experiencing war and the people are in dire straits. The protagonist obtains the "I am for everyone, everyone is for me" function of the system. As long as the satisfaction of residents in an area is improved, new knowledge can be obtained. The protagonist uses the new knowledge acquired to continue to improve residents' lives and further increase satisfaction, and then acquires new knowledge to continue to increase residents' satisfaction... And his territory is increasing. Nobles who pursue power, powerful magicians who have to be careful in their lives, alchemists who thirst for truth, orcs wandering in the forest, and marginalized psychics... Together they form a strange kingdom. However, the order of the world gradually collapsed without anyone knowing.