AbstractIncreased openness and tolerance have marked the twenty‐first century, yet recent years witnessed a decline marked by nationalist movements and reduced support for diversity. We explore the potential link between these two societal changes by examining the association between the perception of universalism values in society and the endorsement of conservation values, right‐wing political attitudes, and nationalism in Poland. Across six correlational studies (total N = 2644), perception of the prevalence of universalism values in fellow citizens was positively linked to one's endorsement of conservation values, right‐wing political attitudes, and nationalism. These links were (a) stronger when participants believed that a considerable part of society still supported conservation values and (b) underlined by a greater perception of the threat posed by universalism values to the traditional way of living. The experimental results (N = 307) did not support causal link between these links but only the underlying role of perceiving a threat from universalism to society, particularly when participants perceived high universalism and conservation values in others. However, this effect was observed only when controlling for one's endorsement of conservation values and the perception of threat from conservation values.