Margaret Storm Jameson was born in Whitby in 1891. Her father and grandfather were successful shipbuilders. She studied at University of Leeds and was elected Secretary of the Women's Representative Council.
Jameson became a socialist at university and was a strong advocate of women having the vote. She also raised funds for the families of union members who took part in the strike that took place in the tailoring industry in Leeds in 1911.
After obtaining a first-class degree in English at the University of Leeds she moved to London in September 1912 and found employment at the Working Women's College in Earls Court. She wrote later that: "I believe that there exists in the intellect of the working class a vigour and freshness that may well bring forth a new Renaissance. For generations crushed under the industrial slavery, I believe that it will move when it does move, with a mighty bound."
Jameson became active in politics and joined the National Union of Women Suffrage Societies(NUWSS). In 1913 she took part in the Women's Pilgrimage to show the House of Commons how many women wanted the vote. Members of the NUWSS set off in the middle of June, and during the next six weeks held a series of meetings all over Britain. An estimated 50,000 women reached Hyde Park in London on 26th July. According to her autobiography, she bit a policeman, during the demonstration.
On 15th January 1913, Jameson married Charles Douglas Clarke, a fellow student at University of Leeds. They lived in a small flat in Shepherd's Bush. According to the author of Margaret Storm Jameson: A Life (2009): "They were very poor, she lunched regularly on plums, and they squabbled bitterly. She tried to commit suicide with an overdose of phenacetin, and he was deeply unsympathetic. She fell ill at the end of the year and went home to her parents in Whitby, while he moved in with his Quaker parents in North London."
Jameson had two articles published in New Age. The first was an attack on the work of George Bernard Shaw. She criticised his plays for their "poor characterisation" and for the "half-baked ideas" that had come from his membership of the Fabian Society. The second article dealt with the unfairness of marriage laws. Jameson also wrote an article for The Egoist that explored the political ideas of Emma Goldman.
Soon after the outbreak of the First World War, Storm Jameson's father joined the Royal Navy and became captain of the Saxon Prince. In the spring of 1916 the ship was sunk off the Irish coast and Jameson was taken prisoner and sent to a military camp at Hamburg.
Her brother, Harold Jameson, although only seventeen, joined the Royal Flying Corps. By 1916 he was a 2nd Lieutenant and had been given the DCM: "for conspicuous coolness and gallantry on several occasions in connection with wireless work under fire." Later that year he won the Military Cross for attacking a German kite balloon under heavy fire. He was killed in January 1917 after being shot down while over No Man's Land.
As Martin Ceadel, the author of Pacifism in Britain 1914-1945 (1980) has pointed out: "Her sense of outrage at the Great War in which so many of her contemporaries, including her brother, had been killed suddenly erupted into overt pacifism... Brooding upon the depressing consequences of the war, she felt an acute sense of guilt at having supported it, and turned her book into an outspoken anti-war polemic.... By the end she had gone so far as to declare herself a pacifist." After the war she joined the Women's International League. Other members included