#5 Margaret Thatcher
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Though equally loved and vilified by modern historians and analysts, it is beyond question that Prime Minister Margaret Thatcher of Great Britain remains one of the most audacious women of history. This Iron Lady, who came to be respected by her enemies and friends alike, held firm in the face of strikes, wars, ideology and treachery. Her legacy may still be a controversial one, but even the most chauvinist right-winger or unionist feminist can likely agree that she was formidable on an international scale.