marduk
quelling chaos since 2352BC
stonehart said: ↑But the divergent possibilities could not interact or intersect with each other, right?
I think an interesting question would be... if you could cause divergent timelines, i.e. go back in time to right some perceived wrong in the past to create a better future, then it wouldn't be your future.
So what would the motivation be? Altruism?
Consider as a situation:
It's the year 2300 and I'm part of a secret government program that develops time travel, and the consequent realization that changing the past causes divergent timelines. Let's call this timeline 'A'.
For some reason, I expend what must be a large amount of energy to go back in time to prevent Cortez from conquering the Aztecs by flying around the Aztec capital city in the year 1500 with my fancy flying machines. Maybe I 'abduct' a few key members of the Aztec government and warn them about the evil Cortez. As a consequence, Cortez' forces are wiped off the face of the earth when they land and the Aztecs remain a viable and prosperous culture throughout the industrialization period.
Let's call this timeline 'B'.
If I then go back to the year 2300 in timeline 'A' then there is no net benefit to my expenditure of energy because all alterations would not have been to my timeline.
If I go back to the year 2300 in timeline 'B' then I may not exist -- having changed my own past, and then there is no net benefit to my expenditure of energy (because I'd be dead).
If the violation of causality causes alternate timelines then I can't change my own timeline. If the violation of causality causes a paradox then it probably isn't possible. In either case, there is little motivation to do except as a r&d project that would by it's very nature be low-key and non-interventionist or a new resource base to be exploited. The former doesn't seem to be what we are witnessing given the sometimes massive and theatrical arial performances that are witnessed. And it doesn't jive with the "we are peaceful space brothers trying to save you from yourselves" kind of enviro-apocalyptical messages sometimes given to abductees.
Given the logical constraints, if I developed time travel technology, I would view the ability to create alternate timelines as a resource to be exploited, not as something to be bettered. There would be no inherint self interest that I see otherwise.
T-Rex steaks, anyone?
/just some thoughts.