James Dean and Marlon Brando made them popular in movies and everyone wanted to wear them. Jeans became a symbol of the youth rebellion during the 1950s and 1960s. College students started to wear them as a protest against the Vietnam War and the establishment. The new trousers were banned in American schools and sometimes in theatres and cinemas. As time went on jeans became more acceptable and today they are worn not only as casual clothes but also at formal events.