Why did the delegates reject a requirement for unanimous ratification to the constitution?

The delegates rejected a requirement for unanimous ratification of the Constitution primarily because they recognized that achieving unanimous consent among the thirteen states would be nearly impossible. They aimed for a more practical approach, opting for a requirement of approval by only nine states to facilitate the establishment of a functional national government. This decision reflected a balance between ensuring broad support and allowing for efficient governance, acknowledging the need for compromise in the face of diverse state interests.