Is Teela really in "control" of the mission to Ringworld? How could she manipulate luck to get something she doesn't even know she wants?

Is it possible to manipulate evolution the way the puppeteers seem to have? Are the puppeteers truly in control of their evolutionary experiments?

In what ways do Teela, Nessus, Louis, and Speaker all "play god"?

Why is Teela fearless at the beginning of the novel? Is fear something that must be learned?

In what ways are Teela, Nessus, Louis, and Speaker all puppets of other characters and forces?

What qualities make Nessus and Speaker truly alien? Is it possible to understand their characters and motivations?

Is it possible for the civilization of the Ringworld Engineers to rise again?

In the future, could it be possible to build a Ringworld like the one in the novel? What would be the reasons...