Final answer:
One piece of evidence that shows that the colonies remained unwilling to fully unify in the mid-1700s is the existence of different colonial governments and laws. Even during the American Revolution, the colonies operated as separate entities.
Step-by-step explanation:
One piece of evidence that shows that the colonies remained unwilling to fully unify in the mid-1700s is the existence of different colonial governments and laws. Each colony had its own assembly and governor, and made decisions independently from other colonies. For example, the colonies had different laws regarding religion, education, and taxation.
This is supported by the fact that even during the American Revolution, when the colonies were fighting against British rule, they operated as separate entities. The Second Continental Congress, which represented the colonies during the Revolution, was more of a loose alliance than a unified government.
Overall, these examples demonstrate that the colonies were not fully unified and retained a level of independence and distinctiveness from one another during the mid-1700s.