The Amish argued that those who had been banned should be avoided even in common meals.
It is a requirement for marriage within the Amish church.
Once a person is baptized with the church, he or she may marry only within the faith.
These Swiss Brethren trace their origins to Felix Manz (c. 1498–1526), who had broken from reformer Huldrych Zwingli.
The Swiss Brethren (from which both Amish and Mennonites draw their roots) began in Zürich, Switzerland but were pushed out by Swiss authorities; the turning point of the persecution being the execution of Anabaptist leader Heinrich Frick in the fall of 1635. The term Amish was first used as a schandename (a term of disgrace) in 1710 by opponents of Jakob Amman.
In the early 18th century, many Amish and Mennonites emigrated to Pennsylvania for a variety of reasons.
Today, the most traditional descendants of the Amish continue to speak Pennsylvania German, also known as "Pennsylvania Dutch", although a dialect of Swiss German is used by Old Order Amish in the Adams County, Indiana area.
Most of the Amish continue to have 6–7 children while benefiting from the major decrease in infant and maternal mortality in the 20th century.
Between 19, the Amish population increased by 120%, Amish church membership begins with baptism, usually between the ages of 16 and 25.
Members who do not conform to these community expectations and who cannot be convinced to repent are excommunicated.
In addition to excommunication, members may be shunned, During adolescence rumspringa ("running around") in some communities, nonconforming behavior that would result in the shunning of an adult who had made the permanent commitment of baptism, may meet with a degree of forbearance.
The first division between Swiss Brethren was recorded in the 17th century between Oberländers (those among the hills) and Emmentaler (those living in the Emmental valley).