Rising inequalities have been described as fertile ground for populist parties across the world. In this article, we investigate the role that inequality perception plays in strengthening populist attitudes and increasing support for populist parties. Using data from the International Social Survey Programme, we find that those who perceive greater inequality in society are more likely to support populist parties. To explore the causal relationship, we also conduct a survey experiment in Denmark, Germany, and Italy, randomly exposing participants to factual information about the wealth distribution. The results show that the perception of inequality can increase populist attitudes, but does not immediately affect the likelihood of voting for populist parties in this context. The findings speak to current debates on how inequalities and their perception became a pre-condition for the rise of populist parties all over Europe.
