When colonists boycotted british goods under the stamp act they

The Stamp Act was passed on March 22, 1765, leading to an uproar in the colonies over an issue that was to be a major cause of the Revolution: taxation without representation. Enacted in November 1765, the controversial act forced colonists to buy a British stamp for every official document they obtained.

it affected it because the kingdoms (with trade) slowly got richer and richer.