In connection with the World Day for Mother Earth New Acropolis Leipzig presented a philosopher with an astonishingly positive view of the world. Gottfried Wilhelm Leibniz, son of the city of Leipzig, maintained that we live in the best of all possible worlds. He derived his famous conclusion through a set of logical arguments: If God, who is almighty, all knowing, good and reasonable, has created this world, then it must be the best possible.

But why is there still so much evil and pain? one may ask. So, participants exchanged their ideas on this and other questions.

Leibniz argued that imperfection and evil may play a necessary and useful role when we look at the whole. In fact, evolution only makes sense, if there is something still to develop, still to make better. Men´s virtues, for example, can best be perfected through constant effort, as Aristoteles suggested, much like the way we train the muscles of our body by practising with weights.