A childish question...
No response required.
I do not have any soft corner for current leadership of KSA.
If oil goes out or gets replaced, there will be major shift of economic growth in favor of those countries who can produce (specially agricultural and related products) and consume within their boundaries and also export them to other countries. China Russia, USA, Indonesia, Pakistan, and Bangladesh are some example. Countries whose economy wholly depend on Oil export will be most effected.
Whose stamps your visa on your visit to Mecca/Medina ? a pretty relevant question. Otherwise this thread would not exist. (Hint: Read the title of the thread)
Russia is quite dependent on natural resources for income as Saudi Arabia. It is a bad example.
You better hope alternative forms of energy are cheap when we run out of oil. Otherwise there will be no economic growth for any of us
There is no assurance heavily populated states of Indonesia, Pakistan and Bangladesh will do well as their populations increase