 Another reason for Francis' return to Italy was that the Franciscan Order had grown at an unprecedented rate compared to previous religious orders, but its organizational sophistication had not kept up with this growth and had little more to govern it than Francis' example and simple rule.To address this problem, Francis prepared a new and more detailed Rule, the "First Rule" or "Rule Without a Papal Bull" ("Regula prima", "Regula non bullata"), which again asserted devotion to poverty and the apostolic life.However, it also introduced greater institutional structure, though this was never officially endorsed by the pope.