Why was Roger Williams expelled from Massachusetts?

Roger Williams was expelled from Massachusetts primarily for criticizing the Puritanism that dominated the colony. He held beliefs that were considered radical at the time, such as the separation of church and state, the idea that individuals should have the freedom to practice their religion without state intervention, and that land should not be taken from Native Americans without fair compensation. His views challenged the theocratic governance of the Puritan leaders, who believed in maintaining a strict religious orthodoxy, leading to his expulsion in 1636. Williams later went on to establish Rhode Island, which became a refuge for those seeking religious freedom, further demonstrating his commitment to individual liberty and the separation of religious and governmental authority.