The Growth Of Primitive Civilization

Pure original text, no system.A modern person, traveling to a primitive society, almost starved to death at the beginning.How does the protagonist escape the crisis of starvation? How to gradually establish credibility and become the leader of a tribe?Can the protagonist help the tribe survive the upcoming winter safely?Can he use his wisdom to resolve the crisis in the face of a powerful cannibal tribe?Faced with a harsh living environment, the protagonist ultimately decides to cultivate good farmland, select good breeding, upgrade weapons, integrate tribes, and ultimately establish a powerful civilized city-state.