Vali nasr , an american political scientist , thinks western islam-watchers put too much stress on philosophy and not enough on social and economic factors .
As markets in human organs go , the one which flourishes on tehran 's vali asr street , where iran 's main transplant hospital is located , is not the cruellest-and there is no lack of people willing to discuss their transactions .
Supporters waving colored flags and banners turned out in tehran 's vali asr square for an election victory rally by iranian president mahmoud ahmedinejad .