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."
Self-love
The emergence of the feminist movement began as early as the 19th century, but only began having major influence during the second wave movement, which included women's rights protests that inevitably led to women gaining the right to vote. These protests not only promoted equality but also suggested that women should recognize their self-worth through the knowledge and acceptance of self-love. Elizabeth Cady Stanton used the Declaration of Independence as a guideline to demonstrate that women have been harshly treated throughout the centuries in her feminist essay titled "Declaration of Sentiments". In the essay she claims that "all men and women are created equal; ... that among these [rights] are life, liberty, and the pursuit of happiness"; and that without these rights, the capacity to feel self-worth and self-love is scarce. This historical essay suggests that a lack of self-esteem and fear of self-love affects modern women due to lingering post-industrial gender conditions.