There is also emphasis on Catholic concept of priesthood and apostolic succession, ecumenism and Mariology. Certain works of Erasmus laid a foundation for religious toleration and ecumenism. A theological conservative, he supported ecumenism on pragmatic grounds. However, many Orthodox Christians are vehemently opposed to ecumenism with other Christian denominations. In the 1950s, the church suffered tensions because of issues of theology, ecumenism, and worship. Still the movement is strongly involved in ecumenism and the Liturgical Movement. Contemporary developments in mainline Protestant churches have dealt a serious blow to ecumenism. The Augustana Synod placed an emphasis on mission, ecumenism, and social service. Cardinal Bea decided on a less contentious document that stressed ecumenism with all non-Christian faiths. Work went forward with the schemata on the Church, bishops and dioceses, and ecumenism. Pope Shenouda III was well known for his commitment to ecumenism. They place high value on ecumenism, personal piety, missions, and music. McAleese has a long-standing involvement in ecumenism and anti-sectarianism. Ecumenism with these sects appears unlikely. Christian denominations since the 20th century have often involved themselves in ecumenism.