This study examined the transmission of social dominance orientation (SDO) from parents and grandparents to children. It was predicted that parents as well as grandparents would pass their social dominance attitudes to children. Children's levels of SDO would thus be the highest when parental and grandparental attitudes are high; the lowest when parental and grandparental attitudes are low; and intermediate when parental and grandparental attitudes are incongruent. These hypotheses were examined in a sample of 93 families including children (in early adulthood), one of their parents, and one of their grandparents. Results yielded support for the predictions. These findings' implications are discussed in terms of their potential to explain previous inconsistent results on the transmission of social attitudes to children. Copyright © 2008 John Wiley & Sons, Ltd.