The Evangelical Church of Czech Brethren embarked on the path of the national and people's church after its establishment in 1918. Although its church constitution received government approval in 1922, as early as 1923 the first proposals for its partial change, which occurred in 1931, appeared at the synod.
Even then, however, the church is not immune to the proposals to change the church constitution and not to be the events of 1938/1939 leading to the break-up of Czechoslovakia, there would probably be a further revision of the church constitution. The period of the World War II represents a fundamental turning point in the history of the church polity of the Evangelical Church of Czech Brethren.
The church took advantage of the experience gained during the Protectorate of Bohemia and Moravia, when there were more forced changes in the church polity, in the post-war period, in which the church enters somewhat transformed.