Final answer:
The unity among the 13 colonies during the first half of the 1700s was significantly bolstered by the shared experiences and challenges during the French and Indian War, as well as the economic bonds formed through the mercantilist system.
Step-by-step explanation:
Factors Leading to Unity Among the 13 Colonies
One significant factor that led to greater unity among the 13 colonies during the first half of the 1700s was the series of imperial wars, such as the French and Indian War (1754-1763). This conflict in particular helped colonists realize their common interests and coordinated defense efforts, fostering a sense of unity against a shared external enemy. The experience of being a part of the British Empire under the mercantilist system and benefiting from economic prosperity further contributed to a shared colonial identity. Additionally, the mercantilist system created economic bonds that drew the colonies closer together, while tensions with the mother country over issues like taxation without representation highlighted similarities among the colonists, leading to increased cooperation, such as the establishment of the Committees of Correspondence and the Continental Congresses.