Why did athens and sparta go to war

Hello princess. So to know why the Athens and Sparta went to war, you need to dive deeper into their history. As you can tell, the Athens had a more open city, to the imagination and new ideas, while Sparta thought that they should shield themselves from anything and everything but their little towns that were inside the walls. Slave revolt caused Sparta to change how they acted because of how bad it was and how many lives were lost. The Athens and Sparta eventually had a war is 431-404 B.C.E. that caused famine, death, plague, and misfortune. Now the reason Athens and Sparta had a war was that of a rivalry on how a town or city should be run and as each of the two cities was growing stronger and stronger by day. Sparta emerged victorious of this war and has a great story to tell in the history books. Hope this helped, if you have any questions, please ask!