Gottfried Wilhem von Leibniz was born on July 1, 1646 in the city of Leipzig, Saxony. His father, Friedrich Leibniz, served as a professor of moral philosophy at the University of Leipzig. His mother named Cathahna Scmuck is a lawyer. When he was 6 years old, Leibniz died orphaned, because his father had died. Leibniz entered the University of Leipzig as a law student. He completed his undergraduate program in 1663 and obtained his doctorate in 1666.

In his cosmological argument, Leibniz settled on the causes of infinite retreat. It does not depend on the premise of refusing an infinite backward cause. In addition, for him, the world or the universe is a whole consisting of contingent creators. A series of pengada-connected with events. Therefore, the world as a whole is contingent.

For Leibniz, the existence of a being is always in need of an explanation of its existence. In a series, there is a direct relationship between the earlier provider and the next one. Besides that, Leibniz also gave a limit to the suppliers in a series to arrive at a full explanation of its existence.

To explain the existence of a pengada that can make all the suppliers available, while everything that exists is a contingent, Leibniz takes the solution that the supply must be outside the circuit, because each series cannot provide an explanation to itself. The existence of this existence must be explained in a causal activity of the creator outside the circuit. Therefore, there must be a necessity, which Leibniz calls sufficient reason. Every pengada must have this principle as a guarantee of its existence.