She was trained as a teacher at Cardiff University, and worked for a decade as a schoolteacher in a Welsh elementary school.

In 1936, Pallister joined the pacifist organisation Peace Pledge Union, and in 1945 she was elected as a member of the organization's council.

She attended Tasker's High School for Girls and earned a teaching credential at Cardiff University.

[3] Minnie Pallister taught for ten years in an elementary school in Brynmawr, where she became familiar with Welsh working lives.

By 1914 she was president of the Monmouthshire Federation of the Independent Labour Party (the first woman elected to that position),[4] and serving on the Breconshire Education Committee.

[3] In World War I and later she was busy as a speaker for the peace and labour movements,[6] and organised the No-Conscription Fellowship in Wales.

[7] In 1922, as ILP organiser for South Wales, she was quoted on the front page of the Labour Leader declaring: "We were right on the War.

Pallister wrote 600 articles, over 150 radio scripts, five books, including an autobiographical account and pamphlets.

[11][15] The books included Socialism for Women (pamphlet, 1923);[16] The Orange Box: Thoughts of a Socialist Propagandist (1924);[17] Socialism, Equality and Happiness (pamphlet, 1925);[18] Rain on the Corn and Other Sketches (1928);[19] Gardener's Frenzy: Being an Alphabet of the Garden (1933);[20] and A Cabbage for a Year (1934).