Margaret Thatcher died April 8, 2013 from a stroke. She was 87. She had been the longest serving British Prime Minister of the 20th century. She set off a profound reversal in national fortunes that became known as Thatcherism — transforming her country's politics such that for Labour to come back to power, the erstwhile Socialists had to adopt a much more centrist stance, hence Tony Blair's "New Labour." What Margaret Thatcher began is also rightly referred to as the Thatcher Revolution because the leader of the Conservative Party was a radical ideologue whose policies turned British society upside down — and still cause heated if not vitriolic arguments. In recognition of her 11-1/2 years in office and her immense achievements, historians will inevitably rank her alongside Winston Churchill as the greatest of this century's British Prime Ministers.