Memes are at once the mechanism and the very fuel of social networks. It only takes a few people to propagate a meme from being a minority pastime to becoming social norm. Moscovici, the social psychologist conducted research into minority influence, and showed that a small group can change the views of a majority: that's how communism, Nazism, Christianity, and bottled mineral water started.One of the more interesting memes to emerge in recent times, is for people in England to drive around during sports tournaments with the St George's flag flying on their car. To the non-British ear this perhaps doesn't sound too radical, but twenty years ago this would have only been done by far-Right political 'activists'. The World Cup brought out millions of St George crosses as the symbol became increasingly mainstream. These flags have just appeared out of nowhere. No idea who started this one, but its changed perceptions of the flag, those who fly it, and also how its used. Once you look beyond the surface of this meme, there are some more difficult themes than sporting solidarity, but on the surface this is an interesting example of how a small (unidentified) group can influence a majority and spawn a meme that replicates through the social graph.