Who were the main opponents of the decisions made at the Council of Chalcedon?

The main opponents of the decisions made at the Council of Chalcedon were the Monophysites. This council, held in 451 AD, addressed the nature of Christ, affirming that He is in two natures, divine and human, united in one person. The Monophysites, who believed that Christ had a single, divine nature, opposed this definition, arguing instead for a Christology that emphasized His divinity at the expense of His humanity.

The significance of this disagreement lies in the theological implications for the understanding of the incarnation of Christ. The Monophysite position led to a schism within the Church, as many factions, particularly those in Egypt and Syria, rejected the Chalcedonian definition. Their opposition was rooted in concerns over the nature of salvation and the relationship between the human and divine in Christ.

Understanding this context clarifies why the Monophysites are recognized as the primary opponents of the Chalcedonian decrees.