Final answer:
Excluding the elaborate liturgical reworking, changes to The Book of Common Prayer since 1549 have been minor, with Thomas Cranmer's work as the only substantial revision. This reflects a theological compromise and the Elizabethan Settlement.
Step-by-step explanation:
If we exclude the elaborate liturgical reworking, the changes that have been made in The Book of Common Prayer since its first appearance in 1549 have been relatively minor. The work of Thomas Cranmer, the only substantial revision in its history, has remained essentially intact. The Elizabethan Settlement, a response to the Marian exiles, established the Anglican worship format for centuries. The settlement reflects a theological compromise between Catholicism and Calvinist theology, balancing traditional Catholic rituals with Protestant reformation ideals. The Act of Uniformity of 1559 reintroduced The Book of Common Prayer as the sole legal worship form and made concessions to those reluctant to abandon Catholicism, such as removing the Pope's condemnation and vaguely describing communion to avoid clear statements about transubstantiation.