Third-wave feminism refers to several diverse strains of feminist activity and study, whose exact boundaries in the history of feminism are a subject of debate, but are generally marked as beginning in the early 1990s and continuing to the present. The movement arose partially as a response to the perceived failures of and backlash against initiatives and movements created by second-wave feminism during the 1960s, '70s, and '80s, and the perception that women are of "many colors, ethnicities, nationalities, religions, and cultural backgrounds". This wave of feminism expands the topic of feminism to include a diverse group of women with a diverse set of identities. Rebecca Walker coined the term "third-wave feminism" in a 1992 essay. It has been proposed that Walker has become somewhat of a symbol of the third wave's focus on queer and non-white women. Third Wave feminists have broadened their goals, focusing on ideas like queer theory, and abolishing gender role expectations and stereotypes. Unlike the determined position of second wave feminists about women in pornography, sex work, and prostitution, third-wave feminists were rather ambiguous and divided about these themes (feminist sex wars).