What was the one key belief shared by the different Anabaptist sects?

The one key belief shared by different Anabaptist sects was the practice of adult baptism, emphasizing that baptism should only be administered to individuals who are capable of making a conscious, personal decision to follow Christ. This belief stemmed from their commitment to a faith that involves personal conviction and a separation from the state, resisting infant baptism as they viewed it as lacking personal accountability. Additionally, Anabaptists advocated for a life of discipleship, community, and nonviolence, which further distinguished them from other Christian groups of their time.