Answer:
The need to have better protection led to innovations in tools and weapons.
Step-by-step explanation:
It began at a point when the various insignificant city-state rules of the Spring and Autumn period had been incorporated into seven significant contenders and a few insignificant enclaves. It was disturbed by two hundred years of brutality and combat. It profited from the leadership of philosophers who struggled with the king. It encountered strong guidance from feudal chiefs under the king.