I say amen to this article by Farooq Sulehria
The list is long. Indeed, unending. However, the solution to all our problems is always simple: return to an imagined past which, mercifully for the people of the seventh century, never existed. Every time, a scientist in the West is ready with an invention, our ready made answer is: we knew about it 1,400 years ago what the West has found only now.
