(...) This natural expansion of product design beyond its historic roots as the handmaiden of industry and commerce has allowed (some) designers to step into a wondrous new frontier—employing their design thinking to promote, and potentially affect, social thought. While "good design" is often professed to be unobtrusive, intuitive, invisible and something that does not make the user think too much, discursive design instead actually targets the intellect. The primary goal is to prompt self-reflection, ignite the imagination, and foment contemplation—to deliberately make the user think (deeply).
Just as the graphic designer can create more readable and effective election ballots, they also can create political posters. Both activities employ the same tools and mediums, but one helps people do, the other helps people think.