To the brave reader who managed to read up to this point, a great thank you for your attention. To those who skipped a few chapters and come here to get the abstract, my apologies for being too long in the previous chapters – that is because the evolution of societies is indeed somewhat complex.

This chapter proposes a wrap-up of the theory (Section 9.1); then some final considerations (what I think of that theory myself) in Section 9.2 –and then you’re through!