Prime Minister

Institutional context

The Prime Minister of Ceylon (renamed Sri Lanka in 1972) is the head of government in a parliamentary system descended from British constitutional practice. The office dates to Ceylon's independence in 1948. From 1948 through July 1960 every holder was male — a span of twelve years.

Career path

Bandaranaike (born Yasodara Sirima Ratwatte Dias Bandaranaike, 1916) was educated at St Bridget's Convent in Colombo. She entered public life through her husband, Solomon Bandaranaike, the founder of the Sri Lanka Freedom Party who served as Prime Minister from 1956 until his assassination in September 1959. Following his death she was drafted by the SLFP as its leader for the 1960 general election.

Appointment

The SLFP led by Bandaranaike won the July 1960 general election, and she was sworn in as Prime Minister on 21 July 1960. She is the first woman in modern history to be elected head of government of any country.

Tenure

Across three non-consecutive terms — 1960–1965, 1970–1977, and 1994–2000 — she served approximately seventeen years as Prime Minister. The first term oversaw the nationalisation of foreign-owned petroleum companies and the establishment of Ceylon as a non-aligned-movement leader. The second term included the 1972 constitutional change that renamed the country Sri Lanka and made it a republic.

Cluster context

Bandaranaike's 1960 appointment is the dataset's earliest entry and predates Thatcher (the dataset's previous earliest entry) by nineteen years. Her precedence relocates the dataset's baseline: the post-1960 global record shows approximately ten first-woman heads of government across fifty years before the post-2018 cluster begins. The flat-baseline / J-curve thesis is strengthened, not weakened, by extending the time horizon — the rate-acceleration becomes more pronounced when the prior period is longer.

Sources

• Wikipedia — Sirimavo Bandaranaike
• Wikipedia — List of elected and appointed female heads of state and government