The main aim of human life was said to be the advancement of the common good which could only be attained by a relentless pursuit of a virtuous vita activa, active life. The argument underlying in this was that the common good could not materialize unless everyone was fully committed to promote this aim by exercising the full range of civic virtues. Education was also an important element of these programs. Nicholas Jolley sees the whole of Leibniz's philosophy as an ambitious enterprise to synthesize the new mechanical science to traditional metaphysics and natural theology. Science is essentially an ethical science to Leibniz.
Logic serves as a tool or medium for inventing and arranging scientific issues or arguments.
This is evident in his division of the universe into the Kingdom of Nature and the Kingdom of Grace, as we saw before. Logic is above both of these kingdoms. These three domains form the basis of Leibniz's practical program. Leibniz's own logical and philosophical interests made him seek for the principles of logic and ethics upon which a normative system of law and justice must rest. The law must be reduced to its primitive notions, which is an application of his general scientific method.