Why did john calvin write the institutes of the christian religion?

John Calvin wrote the Institutes of the Christian Religion to explain the Reformation and Protestant beliefs.

Explanation:

The Institutes of the Christian Religion is a treatise on theology written by John Calvin. It was first published in Latin in 1536, and then translated into French by Calvin himself in 1541.

In this work the doctrine of the Reformation, as promoted by Calvin, is developed systematically. Through his text, he emphasizes the contrast between the total power of God and the smallness of man, lost by original sin. Since that sin has made him fall, man has become corrupt in his nature and has been deprived of his free will. Their state depends on divine grace and the beneficiaries have been chosen in a predestined way.