One way was more cooperation between groups , such as the Edinburgh Missionary Conference of Protestants in 1910 , the Justice , Peace and Creation Commission of the World Council of Churches started in 1948 by Protestant and Orthodox churches , and similar national councils , for example the National Council of Churches in Australia with Roman Catholics . One way was greater cooperation between groups , such as the Edinburgh Missionary Conference of Protestants in 1910 , the Justice , Peace and Creation Commission of the World Council of Churches founded in 1948 by Protestant and Orthodox churches , and similar national councils like the National Council of Churches in Australia which includes Roman Catholics .