In my opinion, a society cannot have frontiers. A human society should be built upon equality and freedom, and frontiers make this impossible. All citizens of the world should have the same rights (human, juridic, religious, economical, ...). Also, territory has always been one of the most important reasons for wars. Without borders, this reason drops out. Two big reasons in my opinion.
A human society without nations with frontiers should be possible. The actual world exists of large cities on one hand and rural locations on the other. Most of all humans live in large cities, but also many people live in rural locations. The world should be divided in three: living locations in cities and rural locations on one hand and separate production locations away from the living locations on the other. There is absolutely no necessity for nation borders.
This content is created by the open source Your Priorities citizen engagement platform designed by the non profit Citizens Foundation