Final answer:
The Protestant sect known for advocating adult baptism instead of infant baptism is called the Anabaptists.
Step-by-step explanation:
The Protestant sect that believed Christians should voluntarily profess their faith, which meant they advocated adult baptism rather than infant baptism, is known as the Anabaptists.
The Anabaptists asserted that only adults could make the conscious decision to become Christians, as they could meaningfully renounce sin and make a declaration of faith. This was in contrast to the norm of infant baptism practiced among Catholics and most other Protestant sects, who believed baptism as infants removed the taint of original sin.
The Anabaptists, a Protestant sect emerging during the 16th-century Reformation, upheld the belief that individuals must voluntarily profess their faith, advocating adult baptism instead of infant baptism. This distinctive stance reflected their commitment to a voluntary, personal commitment to Christianity.
Anabaptists were characterized by their emphasis on the separation of church and state, a rejection of infant baptism, and the establishment of voluntary, adult baptism as a symbol of one's conscious commitment to the Christian faith.
This theological perspective set them apart within the broader Protestant movement and influenced their communal and ethical practices, marking them as a distinct group in the complex landscape of religious reform.