It is difficult to compare rule of law that have a long tradition, with regimens that entrust their fate to something as ephemeral as it may be the future. When these break down, leaving only ruins that still have to learn to read. So in your case, you better not talk about reality, but stability. Also among primitive peoples do not have some kinship to ensure stable social ties, while others do manage to create them, but both are equally real. The links are inescapable unstable under certain conditions, and it seems even the neighbor that the world is coming down every time they become apparent. The neighboring tribes do not understand these new transition systems of kinship, and if they could distinguish between reality and fiction, no doubt consider them fictitious.