How campaigning changed with mass literacy
Launch library · evergreen read

As literacy spread more widely, the written word became a genuinely mass medium for campaigning rather than one accessible mainly to an educated few, opening tactics such as widely distributed pamphlets and printed petitions to a far broader public. That widening audience changed what any campaign could realistically attempt to achieve at all.
This shift also changed what kind of persuasion worked best, since campaigns could increasingly rely on readers to engage directly with a written argument rather than depending entirely on oral communication passed person to person. Written argument could now stand largely on its own, without needing a speaker present at all.
Mass literacy did not replace older, spoken forms of campaigning, but it added a powerful new channel alongside them, and the combination of written and spoken persuasion has shaped campaigning strategy in some form ever since. The two channels have worked together far more often than they have competed.