Answer:
Because the colonist did not yet recognize the value of intercolonial unity.
Explanation:
The Albany Plan of Union was to create a unified government for the thirteen colonies, it was suggested by Benjamin Franklin because of the threat of war with French imperial forces and their Native Americans allies.
The plan represented one of the multiple attempts to form a union of the colonies under one government for defense and other purposes. Franklin´s plan called for the creation of a legislative body with the power to control commerce and organize the defense in the face of the upcoming attacks.
Even the interesting ideas purposed by Franklin, the plan was rejected by both colonists and the British Crown. The Crown was worried that if such a union happened it would be very difficult to control the entire bloc. While the colonist did not yet recognize the value of intercolonial unity.
I hope this answer helps you.