Why was the regime in iran overthrown

The overthrow of Iran's elected government in 1953 ensured Western control of Iran's petroleum resources and prevented the Soviet Union from competing for Iranian oil.

Explanation:

In simpler terms, it was overthrown because the west wanted the oil, and to  prevent the Soviet Union from getting the oil.

for this case we have the following equation:

we apply distributive property to the terms within parentheses.

subtracting 2 on both sides of the equation:

answer:

it caused mass african migration, african populations to grow, african empires to topple, and racism against slaves to emerge.