Madara Uchiha and Hashirama Senju

Madara Uchiha 

Hashirama Senju

Madara Uchiha, this man founded the hidden leaf village along with Hashirama senju. There is a detailed story about both Madara and Hashirama clans. The Uchiha were a strong group until they fought a clan with equilibrium strength. That clan was known as the Senju. These clans were formed from a same family who's father was the father of all shinobi. The number one ninja of all shinobi was the sage of six paths. The sage wanted world peace and harmony throughout the world, but when it was still a fantasy his time came. He entrusted his way of the ninja to his two sons, the elder son inherited his eyes the rinnegan, the power of spiritual energy, while the other was gifted with his physical strength. Madara was the descendent of the older brother while the Senju were the younger brothers generation.  Madara wanted to be the next sage of six paths. To seek such power in his clan, he must kill someone dear to him. His friend and comrade who also founded the leaf village who was a Senju is the first hokage, Hashirama Senju was the first friend he ever had. They had never known their clans were enemies so they came to see each other periodically. Until Hashirama and Madara's fathers and two younger brothers were clashing with equal strength, at the final part the fight to fathers threw kunai at the other kid with no sympathy at all. At the split second of that moment two rocks were thrown at the weapons that could've been Tobirama Senju and Izuna Uchiha's demise. Madara and Hashirama had fought for years and years, until they day Madara lost his last brother and had gone berserk. Madara had finally came to an agreement to stop violence and come to peace which lead to the birth of the Leaf Village.

If you are interested in this man or Naruto itself then you can read all its comics.