Former British Prime Minister Margaret Thatcher says in her new book that it is time for Britain to begin withdrawing from the European Union.

Mrs. Thatcher says the European Union is "fundamentally unreformable" and Britain should start pulling out of the 15-nation group. The former prime minister says most of the world's biggest problems during the past century can be traced to mainland Europe, most notably Nazism and Marxism.

Thatcher: Britain Should Withdraw from EU

Mrs. Thatcher, 76, makes her arguments in a new book titled newspaper is serializing the book.

Thatcher: Britain Should Withdraw from EU

She says the opposition Conservative Party, which she led from 1979 through 1990, should undertake "fundamental renegotiation" of Britain's relations with the European Union if it returns to power.

Thatcher: Britain Should Withdraw from EU

As a first step, Mrs. Thatcher says Britain should pull out of the EU common agriculture and fisheries policies.

As for trade, Mrs. Thatcher says Britain should join the United States, Canada and Mexico in the North American Free Trade Agreement.

Conservatives are particularly divided over whether Britain should join the European single currency, the euro.

reports that Mrs. Thatcher's views will embarrass the Conservative Party leader, Iain Duncan Smith, who has attempted to negotiate a party truce over Europe. Mr. Smith has lately steered the Conservatives toward criticizing the government of Prime Minster Tony Blair over accusations of corruption and poor delivery of public services. predicts that Mr. Blair will challenge Mr. Smith to disavow the Thatcher comments at their next debate in parliament.

A spokesman for Mr. Smith declined to comment on the Thatcher book, but he said it would be read with interest.