Born Mary Ann Wilson in Burlington, New Jersey, M'Clintock was raised in a Quaker home. At some point early in Wilson's childhood, she moved to West Chester, PA, where, by 1814, she attended
Westtown School. By 1820, she was married to
Thomas M'Clintock, a fellow socially progressive Quaker. Shortly after their union, M'Clintock began having children. Between 1821 and 1831, M'Clintock had five children: Elizabeth, Mary Ann, Sarah, Charles, and Julia. It was in Waterloo that M'Clintock began, in earnest, her career in advocacy and organization. == Career of advocacy ==