"A familiar theme in patriarchal ideology is that men are rational while women are emotional. This is a deep-seated assumption in European philosophy. It is one of the leading ideas in sex role theory, in the form of the instrumental/expressive dichotomy, and it is widespread in popular culture too. Science and technology, seen by dominant ideology as the motors of progress, are culturally defined as a masculine realm. Hegemonic masculinity establishes its hegemony partly by its claim to embody the power of reason, and thus represent the interests of the whole society; it is a mistake to identify hegemonic masculinity purely with physical aggression."