The year 1767 brought another series of measures that stirred anew all the elements of discord. Charles Townshend, British chancellor of the exchequer, was called upon to draft a new fiscal program. Intent upon reducing British taxes by making more efficient the collection of duties levied on American trade, he tightened customs administration, at the same time sponsoring duties on colonial imports of paper, glass, lead and tea exported from Britain to the colonies. The so-called Townshend Acts were based on the premise that taxes imposed on goods imported by the colonies were legal while internal taxes (like the Stamp Act) were not.  

The Townshend Acts were designed to raise revenue to be used in part to support colonial governors, judges, customs officers and the British army in America. In response, Philadelphia lawyer John Dickinson, in Letters of a Pennsylvania Farmer, argued that Parliament had the right to control imperial commerce but did not have the right to tax the colonies, whether the duties were external or internal.  

The agitation following enactment of the Townshend duties was less violent than that stirred by the Stamp Act, but it was nevertheless strong, particularly in the cities of the Eastern seaboard. Merchants once again resorted to non-importation agreements, and people made do with local products. Colonists, for example, dressed in homespun clothing and found substitutes for tea. They used homemade paper and their houses went unpainted. In Boston, enforcement of the new regulations provoked violence. When customs officials sought to collect duties, they were set upon by the populace and roughly handled. For this infraction, two British regiments were dispatched to protect the customs commissioners.  

The presence of British troops in Boston was a standing invitation to disorder. On March 5, 1770, antagonism between citizens and British soldiers again flared into violence. What began as a harmless snowballing of British soldiers degenerated into a mob attack. Someone gave the order to fire. When the smoke had cleared, three Bostonians lay dead in the snow. Dubbed the "Boston Massacre," the incident was dramatically pictured as proof of British heartlessness and tyranny.