 Islamists and Islamic revivalists have striven to eliminate Western practices in their lives – the use of toothbrushes, mixing of the sexes, women walking about with uncovered heads, Saturday-Sunday weekend days off, applause of speakers – but according to Daniel Pipes, "even in rejecting the West, they accept it," and introduce Western-style innovations to Islam.Critics have noted that Islamists have claimed to uphold eternal religious/political principles but sometimes change with the times, for example embracing "far more modern and egalitarian" interpretations of social justice – including socialist ideas – than the rightly guided caliphs would ever have conceived of.Islamists in power in the Islamic Republic of Iran, have had to "quietly put aside" traditional Islamic divorce and inheritance law and replace them with statutes addressing "contemporary Iranian social needs," according to Graham Fuller.