The Paulist Order

Ecumenism is a permanent element in the total life and work of the Paulists.  Every member should be responsive to the unifying action of the Holy Spirit in other Christians and in their Christian churches, and wherever possible, they should pray and work with them in the one mission of Christ.

Source: Paulist Constitution  -  Paulist Constitution, C5, as quoted in the Paulist Prayer Book, pp 332-333