Well, one might say the Church has changed drastically.
The demand for a reformation of the Catholic church 500 years ago by the masses who felt passionately moved and ready and needing a change led to the formation of a new Christian Church. Protestants may consider their churches a “reformed”, “better” version of the traditional one…a natural, organic, evolving process that the people demanded–and indeed got.
Which new Christian Church?
Are you saying the Catholic Church made a ‘drastic change’ from what it taught and was in AD 1500 from what it was in AD 100, 1000, etc? What were the changes?
Or are you saying the PROTESTANT churches are ‘a new’ (actually several hundred or more new) Christian Church, even though no two of them agree on core tenets and in fact teach contradictory and changeable teachings?
Either way, I think you’re wrong. The Catholic Church does not change doctrinally. Certainly its ‘outer’ appearance (made up by its people) changes. The earliest Churches were homes and catacombs; the Middle Ages saw great soaring cathedrals; the 20th century in the U.S. saw areas in the Northeast that (with the baby boom) had lots of churches built, some of which were in areas which lost population); saw areas in the South which had historically been Protestant begin to grow – the Catholic peoples through time, depending on their own socioecomic status, would have a small church if that was all they could afford, but would give the best they could, little by little, and if their own monetary fortunes thrived, would try to ‘give back’ to God by offering gifts to the Church --vestments, statues, scholarships for men to seek the priesthood, etc.) But through all the changes, whether it was the crash of civilization and the attacks of barbarians, the long history of wars, protection of the poor through hospitals, education of people through universities, protection of knowledge through the monks and their labors to copy precious manuscripts, improvement of people’s health through the monks’ labors in SCIENCE and husbandry, the Great Plague, the fracturing of Christian through heresy and schism, the industrial ‘revolution’, and the ‘globalization’ of society, the Church
has held firmly to the teachings of Christ, as He gave them, nearly 2000 years ago, without change, without ‘bending’ to society and its demands for a ‘different’ gospel.