Why does most of the world's oil come from Saudi Arabia Kuwait Iran Iraq and Algeria?

Answer 1

Most of the world's oil comes from these countries since these countries luckily sit on petroleum deposits. These deposits were created by trees that decayed over 300 million years ago and it happened that those countries sit on areas occupied by those primordial forests. There is no other reason.

Answer 2

This is not actually the case. In fact, almost all of these countries are soil-deficient and have trouble growing things in large swathes of the country.

If the question meant to ask: "Why does most of the world's oil come from Saudi Arabia Kuwait Iran Iraq and Algeria?" please see the Related Question below.