Part of wife’s family is Mennonite. Some live in Canada. Huge variation in their beliefs regarding living a simple lifestyle, old order still use buggies, new ones drive cars and wear normal clothes. Went to one of her relatives wedding. Over 2 hour sermon in middle of the ceremony, in the summer, no AC in the building. Some relatives came in cars, others in buggies. They have hitching rail under shade trees for the horses.
Both Mennonite and Amish go back to the 16th century reformation in Europe as Anabaptists, rejecting the concept of infant baptism, and belief that the church was the community of saved and not a state religion. Both are very sound biblical doctrines. They are generally pacifist and just seek a simple lifestyle. They were heavily persecuted for their beliefs by the state ran Roman Catholic Church, who executed many of their leaders.