How did Legalism lead to the fall of the Qin dynasty? The government’s creation of a strict class system led to class conflict and the weakening of the empire. The government’s reliance on a single ruler left other leaders unprepared to govern in the future. The government’s focus on problems inside China allowed outsiders to invade and overthrow the Qin. The government’s cruel treatment motivated peasants and farmers to join rebels to overthrow the Qin dynasty.