In my view, the single event that had the greatest influence on the independence movement was the passage of the Intolerable Acts in 1774. These acts were a series of punitive measures implemented by the British government in response to the Boston Tea Party, and they significantly escalated tensions between the colonies and Great Britain. The Intolerable Acts not only restricted colonial self-governance but also galvanized the colonies to unite against what they perceived as oppressive legislation.
This event had more influence than the Stamp Act of 1765 and the Boston Massacre of 1770. While the Stamp Act was a significant catalyst for colonial dissent due to its direct taxation without representation, the Intolerable Acts fostered a sense of urgency and collective identity among the colonies, leading to the formation of the First Continental Congress. Similarly, although the Boston Massacre was a shocking event that stirred outrage, it did not provoke the same level of organized response as the Intolerable Acts, which united the colonies in a shared struggle against British authority. Ultimately, the Intolerable Acts served as a turning point that propelled the colonies toward the declaration of independence.