I Am a Lonely Soul in History

Shen Huan traveled through time. In the same world, there are sages and evil spirits born. Some people uphold the will of the sages and create peace for all ages, while some people uphold the souls of evil spirits and bring peace to the world. And there are wild ghosts from dead graves roaming the countryside. The common people are sad and throw themselves to death in the fields. Shen Huan thinks, should the world really be like this?