Social trust has a complex interrelationship with attitudes toward gender equality. Social trust has its origins in exchange relationships in preindustrial societies, lowering uncertainty in transactions and easing interpersonal exchanges. The degree to which this trust was extended to opportunities for women in commercial and societal roles, however, differed across cultures. Prior literature finds attitudes toward individualism and collectivism have significant implications for gender equality and patriarchal attitudes. We combine these ideas arguing that the degree to which social trust fosters gender equality depends upon the degrees of individualism and collectivism. Employing World Values Survey data across countries over time, we find that with low levels of individualism, and high degrees of collectivism, higher levels of trust are not effective in reducing the prevalence of gendered patriarchal attitudes-in fact it entrenches them further, worsening gender equality. However, as individualism rises, and collectivism falls, higher levels of trust become effective in reducing the prevalence of patriarchal beliefs. Thus, collectivistic beliefs stand as a barrier to future improvements in women's equality and economic rights in many societies; preventing social trust from being extended beyond traditional gendered roles.