ground—at least in North American culture. It is 
always important to keep in mind that other 
cultures may reorder their sensory preferences.

A stereotype is a figure repeated so often in a 
culture that it ceases to be noticed and becomes 
part of the unconscious ground of that culture, 
shaping people’s perceptions subliminally.

Marshall McLuhan, “City as Classroom and/or The 
Great Brain Robbery,” Environmental  
Communications , (1979), pp. 2-3.