Duality - Illusion and /or nature of the world?

After discussing the primary and original duality(eternal self/temporary life), let's look at how it seems to permeate everything. Of course, the eternal soul is accepted in different ways and also not at all. The illusory nature of life allows a multitude of conceptions and duality guarantees opposite positions. Hot/cold -North/south etc. By land or country you can often observe the different groups fighting from north and south(or east-west). I guess things tend to attract and repel to perpetuate the desire for conflict and and the "law" of cause and effect. the soul histories we've shared have conditioned us, and the animal nature continues the stories. I've always thought that the purpose of conflict(and hunger) is to keep all moving. Much can be learned, especially when the traveller grows weary of it and seeks a new deeper way of consciousness. The old ways change slowly. The key is to consciously work toward and expect an enlightened way of life, where duality is eclipsed by unity...