Sociology is a field where a large majority of professors lean left. The left-leaning ideology is visible in studies of gender differences in labor markets. In such studies, a left-feminist ideology of equality is taken to be self-evident. Defining equality to equate to slim-outcome difference, however, pre-destines all differences to be seen as outcomes of culturally defined social constructions and discrimination. In this chapter, I hypothesize that this has produced tabooed topics in the field. One such taboo is the acknowledging of differences between men and women. Such differences challenge the left-feminism’s notion of equality in terms of slim-outcome-difference. Research on evolution and preferences is downplayed in favor of cultural explanations. Cultural explanations interpret differences between men and women in labor market behavior as constructed, as largely driven by gender stereotypes and discrimination. The notion that differences can stem from biology or from the choices made by individuals pursuing a lifestyle different from those prescribed by gender researchers is seldom entertained. I hypothesize that the situation stems from gender sociology being dominated by left-feminist ideology.