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How has the Liturgy of the Roman rite developed and changed in history before and after the Council of Trent? What principles have determined the boundaries of legitimate liturgical reform over the centuries? What was the Liturgical Movement? Did Guéranger, Beauduin, Guardini, Parsch, Casel, Bugnini, Jungmann, Bouyer and the Movement's other leaders know and respect these principles? And what is to be said of the not insignificant liturgical reforms carried out by Saint Pius X, Popes Pius IX and Pius XII and Blessed John XXIII in the course of the twentieth century?

In The Organic Development of the Liturgy, Dom Alcuin Reid examines these questions systematically, incisively and in depth, identifying both the content and context of the principle of "organic development"-a fundamental principle of liturgical reform of the Second Vatican Council's Constitution on the Sacred Liturgy Sacrosanctum Concilium-making a significant contribution to the understanding of the nature of the Liturgical Movement and to the ongoing re-assessment of the reforms enacted following the Council.