How did ecumenical councils impact the development of Christian doctrine?

Ecumenical councils played a crucial role in the development of Christian doctrine by providing authoritative clarifications and affirmations of faith. These gatherings of bishops and theologians addressed key theological disputes and controversies that arose within the early Church. Through discussions, debates, and the formulation of creeds, councils such as the Council of Nicaea and the Council of Chalcedon established foundational beliefs, such as the nature of Christ and the Trinity. The resulting creeds often became benchmarks for orthodoxy, allowing for a unified understanding of Christian beliefs across diverse regions. This clarity was essential for maintaining doctrinal integrity within the Church and helped to foster a cohesive Christian identity during times of theological uncertainty. By affirming core tenets of the faith, councils contributed significantly to the ongoing development of Christian theology and practice.