No, it doesn't make us gods. Just sloppy campers. The only improbability [he casually said] is the time machine. If that gets invented, the rest is pretty much inevitable.
Where did it all begin? Doesn't matter, does it? It's an endless loop. Enjoy the ride.
Well, maybe the DI will fund some research.
Maybe, maybe not. Larry Niven has pointed out that the invention of time travel may be "unstable". Once a time machine is invented, sooner or later some time-traveler is going to manage to accidentally screw up the past in a way that messes up the conditions which brought about the invention of the time machine, and thus the discovery of time travel will "remove" itself.
In the new, altered timeline, eventually someone else will invent the time machine, which eventually will lead to its own "uninvention", rinse, repeat.
There's a really good variation on this concept in the film, "The Butterfly Effect", along with a "double whammy" twist ending (although most people I've talked to missed the second mindblower).