This article builds a micro founded model of the clash of cultures. The clash is de…ned as the parent's fear of a trait change by their child in an overlapping generations model with intergenerational transmission of cultural traits. The extent of the clash is manipulated by cultural leaders who bene…t from the cultural education e¤ort by parents. We identify three channels through which the leaders can a¤ect the clash of cultures: (i) by providing bene…cial cultural values, (ii) by claims of cultural superiority and (iii) by cultural alienation, i.e. by inducing cultural dislike towards their own group. We show that all three channels can be in the leader's interest but channels (ii) and (iii) reduce the utility of the leader's goup members. This hints to a strong con ‡ict of interest within groups -between the population at large and the benefactors of radicalization. We further show how the use of alienation relates to the economic opportunities available to a group.Both authors acknowledge the support of Barcelona GSE Research and the government of Catalonia. Hauk thanks the economics department of the London School of Economics for its hospitality and acknowledges …nancial support from CICYT project number ECO2009-12695 and of the programa de movilidad de profesorado project PR2009-0375.