The fields of theology, religion, and ethics often serve as ideological battlegrounds: Should they be primarily conservative—focused on preserving timeless legacies and traditions, or primarily progressive—aiming to adapt to evolving contexts and challenges in pursuit of future advancements? This paper investigates the tension between conservation and progress within contemporary Christian theology, religion, and ethics. It posits that traditional concepts like divine revelation and the deposit of faith have been challenged by a series of ideological revolutions from the late Middle Ages through to postmodernity. These revolutions have significantly altered the human experience of theology, religion, and ethics in the postmodern world. The paper explores how these classic disciplines can serve as reliable custodians of tradition while demonstrating the creativity and flexibility needed to address contemporary challenges. Can conservatism preserve and transmit enduring wisdom without becoming stagnant or irrelevant? Can progressivism confront new challenges innovatively without veering into apostasy? To illustrate these tensions, the paper will examine contemporary issues such as climate change, gender and sexuality, and artificial intelligence through the dual lenses of conservation and progress. Philosophical and theological principles will be proposed to advance towards a sustainable future that prioritizes the holistic well-being of the human person.