Gender, race, and class strongly predict social attitudes and are at the core of social scientific theory and empirical analysis. Sexuality (i.e., sexual orientation), however, is not as central a factor by which we conceptualize and systematize society. This study examines the impact of sexual orientation, gender, race, and education across attitudinal topics covered by the General Social Survey. Sexual orientation is an important part of people's lives that, as I demonstrate, is a strong and exceptionally consistent predictor of social attitudes across issues regardless of whether it is measured with partnering behavior or self-identification. When sexual behavior and identity differ, however, identity is more influential. This pattern lends support to a marginalized identity explanation for why sexual minorities are consistently liberal. I conclude that future work should pay more attention to sexuality as a core factor in social scientific theory and empirical analysis.