 After the war , Lang 's primary cause was that of church unity . In 1920 , as chairman of the Reunion Committee at the Sixth Lambeth Conference , he promoted an " Appeal to all Christian People " , described by Hastings as " one of the rare historical documents that does not get forgotten with the years " . It was unanimously adopted as the Conference 's Resolution 9 , and ended : " We ... ask that all should unite in a new and great endeavour to recover and to manifest to the world the unity of the Body of Christ for which He prayed . " Despite initial warmth from the English Free Churches , little could be achieved in terms of practical union between episcopal and non @-@ episcopal churches , and the initiative was allowed to lapse . Historically , however , the Appeal is considered the starting @-@ point for the more successful ecumenical efforts of later generations . 
