How did the current situation in Kashmir develop, and how can it be resolved?

Kashmir has been in big conflicts, mostly between India and Pakistan. These conflicts are mostly developed by religion. Pakistan is mostly Muslim, and Kashmir as well, so it would seem logical for Kashmir to join Pakistan, but the leader of Kashmir was Indian so then Kashmir would join India. Also the main river where Pakistan gets their water from, starts in the Indian part of Kashmir, so if India decided to build a dam in that river, Pakistan would have a big problem. These problems made a lot of war, since both Pakistan and India want the whole of Kashmir. Now Kashmir is contained of three regions, one from China, India and Pakistan.

The conflict about Kashmir can be resolved in a few different ways. The easiest way would be to make Kashmir an independent country. Another possible way is to definitely divide Kashmir between India and Pakistan, so there is no need for war anymore.