Docherty's father joined the Fife Communist Anarchist Group, and was also a founding member of the Communist Party in Britain. Docherty herself joined the Communist Party at the age of 18, the youngest age at which she was able to do so, soon after the
1926 United Kingdom general strike. She initially became a member of the Young Communist League, or YCL. During the strike, she was involved in the "Local Councils of Action", which were inspired by the Russian Soviets, and helped coordinate the strike. The miners' defeat in the strike was very influential upon her. The Communist Party provided her with an
adult education, during which she was one of two women among 48 men. The other woman in her class was her mother. While still a teenager, she became the literature secretary for the Cowdenbeath branch of the party, and was responsible for the production and sale of a number of weekly newspapers. While Docherty was still in her twenties, she organized a children's wing of the party in Cowdenbeath, known as the "Young Pioneers". During propaganda meetings of the children's wing, she taught songs, poetry, and plays, and in 1928 organised an agitation to obtain a holiday for all schoolchildren on 1 May, or
Labour Day, which was successful in five different burghs, including Cowdenbeath. She also organized a campaign against
corporal punishment, and for free food for children while they were at school. The use of the strap to punish children was eventually prohibited after the communists were elected to the Fife education authority and the town council in
Lochgelly. Her affiliation with the party allowed her to travel to the Soviet Union in 1929 as a Scottish delegate to a gathering of young communists. In the same year she had tried to join the
National Unemployed Workers' Movement, but was told that women were not allowed to be members. Docherty had a great love for the Soviet Union, despite what she saw as a political breakdown in that country.
Vladimir Lenin was an idol of hers. During her time in Russia she spent three months in a
sanatorium near the
Black Sea, recovering from tuberculosis. She had had an operation on a tumor related to the disease before she left Fife, but was cured completely at the sanatorium. She also visited a motor vehicle factory, and found it impressive, because "it [wasn't] for their sel', it was for everybody because everything belonged to them". During her time in
Moscow, she learned Russian, visited the
Bolshoi, and took part in a parade on the 12th anniversary of the
Russian Revolution. Of her time in the Soviet Union, she stated: In 1937, she volunteered to fight in the
Spanish Civil War with the
International Brigade; however, she was turned down, because she did not have medical experience. She took to fundraising for the Republican forces in the war, participating in the "
Aid Spain" campaign. She became the treasurer of a women's group which raised funds for the wives of men who had gone to fight in the civil war. Docherty remained a member of the Communist Party for 70 years, at times working with
Alex Moffat and
Abe Moffat. She campaigned for
Jack Leckie when he was a candidate for the
Dunfermline Burghs constituency. She worked for
Willie Gallacher, the communist Member of Parliament for Fife, for several years, and in 1952 unsuccessfully ran for a city council seat. At various points, Docherty held the positions of treasurer, Women's Group leader, and secretary for the Fife branch of the Communist Party. She retired from active political life when she was 60 years old, but despite being crippled by
arthritis, participated in fundraising efforts for the newspaper
Morning Star. She lived in a modest house in Cowdenbeath, and spent her time working on her memoirs. She continued to give talks and participate in
International Women's Day events nearly every year until her death on 2 February 2000. ==Employment==