Without professional writing staffs of journalists or correspondents, eighteenth-century newspaper printers relied heavily on an intercolonial newspaper exchange system to fill their pages. Printers often copied entire paragraphs or columns directly from other newspapers and frequently without attribution. As a result, identical news reports often appeared in multiple papers throughout America. This news-swapping technique, and resulting plagiarism, helped spread the ideas of liberty and uphold the colonists' resistance to British Parliament.