Women's organizations demanded a number of social reforms, including equal pay for equal work, prohibition and femal suffrage. "Getting into politics was just housekeeping of a national scale."
Irene never liked political campaigns. She could stand before an audience and deliver a clear and convincing speech and she was good at rebuttal. But she was never at ease when faced with rough argument or rude heckling. She remembered the 1921 provincial campaign as having been "nasty," with much abuse against herself. "The only thing which seemed to concern my opponents," she said, "was that I am a woman—and worse, an Englishwoman who, although I came to Western Canada when it was still an undeveloped wilderness, could not possibly know anything about it!" Despite these declarations concerning her unsuitability for the legislature, she was elected. "The farmers put me in," she said.
The people of Alberta also elected 39 other UFA candidates. The provincial legislature at this time had 61 seats, and this gave their party majority power. In the UFA government of 1921-1935, first under Premier Herbert Greenfield, then Premier J.E. Brownlee, Irene Parlby was Minister without Portfolio. At the time of her appointment, only one other woman—Mary Ellen Smith of British Columbia—had ever held cabinet rank within the British Empire. Irene represented Lacombe for 14 years. Minister Parlby established travelling medical clinics and advocated for the principle of distance education. She successfully sponsored the Minimum Wage for Women Act (1925) and spent her life supporting initiatives to improve the lives of women and children, especially through the Persons Case.
Parlby's work as a politician earned her first provincial, then national, and eventually international respect. Some people called her the "Minister of Cooperation." This title recognized her ability to work co-operatively with others to benefit all people. In 1928 Irene gave a speech, "What Business Have Women in Politics?" In it she voiced her conviction that women were needed in politics. She believed in learning by doing. She said that by entering politics, women would learn politics. In recognition of her years of service on the Board of Governors at the University of Alberta, this nation builder was also granted an honorary law degree.
Despite her success and the respect of her peers, Irene did not enjoy her political involvement. Her motivation was a strong sense of duty. Before she retired from politics in 1935, she served her adopted country internationally when Prime Minister R.B. Bennett made Irene a Canadian delegate to the League of Nations, the forerunner to the United Nations.
After her retirement, Irene continued to live where she and Walter Parlby had originally settled. The woman whose reluctant efforts contributed so much to Alberta's early days, died at the age of 97 on July 12, 1965, on the ranch she and her husband had built many years before. Her gravestone reads: "Irene Parlby, LLD."
"The Honourable Irene Parlby was the most gracious woman I have had the pleasure to meet. She was interested in the young people. When my daughter Darlene won a trip to the United Nations she invited us out to tea; giving Darlene places to look for in New York. A ride on her horse was an enjoyable time for Irene, and she rode so well."
- Alice Whitfield