Transnational feminism
In the "Oxford Handbook of Transnational Feminist Movements", Valentine Moghadam says that "women have worked together across borders since at least the mid-1800s. (55)" What is now called first wave feminism started in the early twentieth century in the West with a focus on women's suffrage. 
During World War II, the United States government gave women jobs because the war had caused a national shortage of labor. After the war ended, Irene Tinker says (oxford transnational), these jobs were taken away but women were no longer satisfied going back to their previous gender roles. Starting in the 1960s in the United States, second wave feminism emerged, defined by women's organization around "equal right to education, employment, and equal pay for equal work, and on sexual and reproductive rights."
Fat feminism
Fat feminism and the related fat acceptance movement originated in the late 1960s, alongside second-wave feminism. During the late 1960's and 1970's, activists such as Sara Fishman, Dr. Franklin Igway, Judy Freespirit, Aldebaran, and Karen Jones, now known as Karen Stimson, emerged. In 1973, Fishman and Freespirit released "Fat Liberation Manifesto" which opposed size discrimination, describing it as sexism. Their movement was met with mixed reactions during the 1960's, the same decade that very thin models, such as Twiggy, became fashionable. Some of the feminists, such as Gloria Steinem and Jane Fonda, who were active during the decade believed that removing traits of "femaleness" was necessary to gain entrance to a male-dominated society. This ideal would make removing feminine curves, making fat unfeminist. Despite this, activists continued to hold demonstrations and continued their course of action. When the fat feminists did not get support from National Organization for Women, they founded organizations to advocate size acceptance, such as Fat Underground (opened up by Judy Freespirit and Aldebaran), The Body Image Task Force (Santa Cruz) and The Body Positive. The first fat feminist book, "Fat is a Feminist Issue", by Susie Orbach was published in 1978.