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."
Socialist feminism
Feminist historian Linda Gordon asserts that socialist feminism is inherently intersectional, at least to a certain degree, because it takes into account both gender and class. Gordon says that because the foundation of socialist feminism rests on multiple axes, socialist feminism has a history of intersectionality that can be traced back to a period decades before Dr. Kimberlé Crenshaw first articulated the concept of intersectionality in 1989. According to Gordon, socialist feminism of the 1980’s expanded upon the concept of intersectionality by examining the overlapping structures that instantiate oppression. Feminist scholar and women’s studies professor Elizabeth Lapovsky Kennedy says that this broader analysis of societal structures began with socialist feminism and served as a catalyst for feminist scholarship. Kennedy says that many of the first women’s studies programs were established by socialist feminist theorists.