According to Catholic academic Jeffrey P. von Arx,The threat to the Catholic Church and the papacy through the 19th century was real, and the church’s reaction to that threat was understandable. Indeed, the church remained threatened on all sides. On the left, secular liberals sought to reduce or eliminate the role of the church in public life and civil society (by suppressing church schools, for example, and expelling religious congregations). The more radical heirs of the revolution and the socialists and communists into whom they evolved remained committed to the church’s utter destruction. But the threat was also from the nationalist right. Otto von Bismarck’s Kulturkampf was aimed directly at the Catholic Church, imposing state supervision of Catholic schools and seminaries and government appointment of bishops with no reference to Rome.