What caused the breakdown of the reservation system

The White Settlers in America initiated a unique reservation system (the Indian reservation system) for the native American community. With the arrangements of this system, the white settlers could reside on the land of the Native Americans. However, the main reasons for the  breakdown of the reservation system are the following:

1. Many American Indians refused the power of the officers who engaged treaties that ordered them to relocate to reservations.

2. Living in a confined area was an alien idea to many American Indians

3. White settlers required more of the property that was held for American Indians.

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what are the choices btw if it was me id say the lack of money to continue with education