The 1990s saw the rise of multiculturalism and alternative media like grunge, rave, and hip hop spread globally among youth. New technology was introduced, including the World Wide Web in 1993 and growing mobile phone use. British culture reinvented itself as "Cool Britannia" after economic recession in the early 1990s, characterized by bands like Oasis and fashion trends like curtained haircuts. Political factors included Margaret Thatcher stepping down in 1991 and Tony Blair becoming prime minister in 1997, while conflicts in the Gulf War and Yugoslavia introduced new terms to the English language.