Bryan McAllister’s personal reference notebook
August 1, 2026Short & citedBlog
Civic Viewpoint.
A quiet encyclopedia with a personal desk
Kept by Bryan McAllister — short guides, clear facts, and the Canadian angle when it matters.
Civic Brief • Politics

Margaret Thatcher

Margaret Thatcher was a British Conservative Party politician who served as Prime Minister of the United Kingdom from 1979 to 1990.

Updated August 1, 20261 min readCited sources

Margaret Thatcher was the first woman to serve as Prime Minister of the United Kingdom, from 1979 to 1990. She is a defining and divisive figure in modern British politics, known for her sweeping free-market reforms.

What it is

Margaret Thatcher was a British Conservative politician who served as Prime Minister from 1979 to 1990. Born Margaret Roberts in Grantham, she studied chemistry at Oxford and later became a lawyer. She entered Parliament in 1959, led her party from 1975, and won three general elections, becoming the UK’s first female prime minister.

Why it matters

Thatcher’s governments reshaped Britain through privatization, monetarist economics, and curbs on trade union power. Her influence extended globally, including into Canadian debates on deregulation, fiscal restraint, and the role of organized labour. Her legacy remains deeply debated, with supporters crediting economic revival and critics pointing to social division.

Key details

Thatcher served three consecutive terms (11 years and 7 months). Key policies included selling state-owned industries, controlling inflation through monetary targets, and limiting union strikes. She resigned in 1990 after losing party support, and died in 2013 at age 87. Her tenure is often paired with Ronald Reagan’s in the US as a high point of 1980s conservative politics.

In short

  • First woman prime minister of the United Kingdom, 1979–1990.
  • Promoted privatization, monetarism, and reduced trade union power.
  • Served three consecutive terms; resigned in 1990.
  • Influenced conservative politics in Canada and elsewhere.
Canadian angle

Margaret Thatcher’s tenure influenced broader Anglophone conservative politics, including debates in Canada over privatization, deregulation, fiscal restraint, and the role of organized labour.

Quick questions

Who was Margaret Thatcher?
Margaret Thatcher was a British Conservative politician who served as Prime Minister of the United Kingdom from 1979 to 1990.
Why was Margaret Thatcher significant?
She was the first woman to become prime minister of the UK and one of the most influential British leaders of the 20th century.
What were Thatcher’s main policies?
Her governments emphasized privatization, monetarism, tax and market reforms, and a reduction in trade union power.

Sources

  1. University of Cambridge Archives — https://archives.chu.cam.ac.uk/collections/thatcher-papers/thatcher-biography/
    Supports: Birthplace, premiership dates, three terms in office, historical significance.
  2. Encyclopaedia Britannica — https://www.britannica.com/biography/Margaret-Thatcher
    Supports: Birth and death dates, office held, first woman prime minister, key political orientation.
  3. The Margaret Thatcher Foundation — https://www.margaretthatcher.org/essential/biography
    Supports: Biographical overview, first woman to lead a major Western democracy, premiership length, resignation date.
  4. EBSCO Research Starters — https://www.ebsco.com/research-starters/biography/margaret-thatcher
    Supports: Education, parliamentary entry, political principles, and rise within the Conservative Party.