A City Guide To Shashi for But what is the chemistry of cultural life? How, we might ask, do symbol pools maintain and transform themselves? In other words, how do memes reproduce? Memes propagate themselves through social interaction. As Dawkins writes, they leap from brain to brain via a process which, in the broad sense, can be the question of human nature 4 1 called imitation. . . . When you plant a fertile meme in my mind you literally parasitize my brain, turning it into a vehicle for the meme’s propagation in just the way that a virus may parasitize the genetic mechanism of a host cell.23 In other words, when we speak or act in a way that influences others to speak or act in a similar way, we are effectively propagating a meme. A City Guide To Shashi 2016.