They asserted that the real purpose of the troops was to overawe their
governments. The despatch of the regiments to Boston in 1768 was plainly
intended to subdue a turbulent population. The British government made a
serious mistake in insisting upon this point, whether with or without
taxes.

[Sidenote: Resistance to Acts of Trade.]

By far the most effective cause of the Revolution was the English
commercial system. One reason why a tax was felt to be so great a hardship
was, that the colonies were already paying a heavy indirect tribute to the
British nation, by the limitations on their trade. The fact that French
and Spanish colonists suffered more than they did, was no argument to
Englishmen accustomed in most ways to regulate themselves. The commercial
system might have been enforced; perhaps a tax might have been laid: the
two together made a grievance which the colonies would not endure.

[Sidenote: Stand for the charters.]

The coercive acts of 1774 gave a definite object for the general
indignation. In altering the government of Massachusetts they destroyed
the security of all the colonies. The Crown was held unable to withdraw a
privilege once granted; Parliament might, however, undo to-morrow what it
had done to-day. The instinct of the Americans was for a rigid
constitution, unalterable by the ordinary forms of law. They were right in
calling the coercive acts unconstitutional. They were contrary to the
charters, they were contrary to precedent, and in the minds of the
colonists the charters and precedent, taken together, formed an
irrepealable body of law.