TL;DR: Many models of the future exist. Several are relevant. Hyperbolic model is strongest, but too strange.
Our need: correct model of the future
Different people: different models = no communication.
Assumptions:
Model of the future = main driving force of historical process + graphic of changes
Model of the future determines global risks
The map: lists all main future models.
Structure: from fast growth – to slow growth models.
Pfd: http://immortality-roadmap.com/futuremodelseng.pdf
While most of these models are intuitive to grasp, I noticed I was confused by the spiral. So I followed the link, but the article doesn't seem to explain it at all.
According to the text, we are living in an era of ever accelerating "yangization", whatever that might mean. But the picture instead shows history as a process with two ever-dwindling parameters (cockiness / horse-iness), which are never explained in the text.
Now I'm more confused than when I started.
One of the proponents of spiral development was Karl Marx. He claimed that history will come to the same constructions but on the higher level of development. E.g. he claimed that primitive communism of tribal people will be reached again on the highest level of society development. He probably got the idea of spiral development from Hegel.
Spiral development is combination of idea of progress and idea of circularity of history.
About yangization... I think I have to update the link ))