Final answer:
Journalism and media have historically been powerful influences on public opinion.
Step-by-step explanation:
Historically, journalism and media have been among the most powerful influences on public opinion. In the late 19th century, newspapers deliberately played on jingoistic passions and inflamed public opinion to drive conflicts. As representative governments emerged in Europe, public opinion became more significant as average citizens had the power to shape policies and politicians responded to the demands of the people.