Though almost by definition trend-driven and therefore imitative, real change in fashion has been triggered by a number of key events, catalysts which have moulded attitudes and style through the 20th Century. These Key Moments in Fashion range from the birth of the bra to the sportswear revolution, with influences as diverse as Vogue magazine, Marlon Brando and Vivienne Westwood all making their mark on the way we dress. A team of fashion writers present fifteen key concepts, items of clothing and personalities that not only influenced the way we dress, but helped define the mood of the times and in doing so changed the course of fashion forever