This publication will acquaint the reader with the works of the largest German encyclopedist, idealist philosopher, scientist and public figure G.V. Leibniz. The first volume of the collected works of the thinker included works on general issues of his philosophy, i.e. mainly metaphysics. The second volume included the main epistemological work of the great philosopher-encyclopedist "New experiments on human understanding. The publication will also acquaint the reader with Leibniz's correspondence, which touches on the problems that are the subject of his polemic with Locke. The third volume includes Leibniz's epistemological and logical works. The fourth volume included one of the main works of G.V. Leibniz - "Theodicy's experiments on the goodness of God, human freedom and the beginning of evil," which reveals the most important categories of his philosophical system.