Another Carnaby Street special is Fab.

This also brings to mind mod, whch over here in the US simply meant a type of fashion. But after seeing The Who's movie Quadrophenia I realized that in Britain it was actually a youth social cult, The Mods, very seriously at odds, to the point of violence, with other youth sects. And, yet, after all these years, I've never been quite clear about the reasons for the divisions in the youth-groups there at that time...the closest analogy I can come up with here in the US is the hippies and the greasers (which were categorized as all the slick-backed hair, 50's style guys and gals)...but they just kind of let each other be here, no push for violence or anything like that)...could anyone from across the Atlantic pond elaborate a bit on The Mods for us?