How did Steve Rogers go back in time without changing anything?

At the end of Avengers: Endgame, Steve Rogers travels back in time to return each of the Infinity Stones to the exact moment they were taken by the Avengers earlier in the film. It’s implied that Steve succeeds in doing this, but he never returns through the Avengers’ time travel machine.

How did Steve Rogers not change the timeline?

Back when Avengers: Endgame came out, writers Christopher Markus and Stephen McFeely revealed that in their opinion, there was no alternate timeline – Cap lived his life quietly in the main timeline: So people are asking… So Steve going back and just being there would not create a new timeline.

Did Steve Rogers change history in ‘Endgame’?

Avengers: Endgame writer Christopher Markus says Steve Rogers didn’t change history when he went back in time, but there’s no chance that’s the case. The climax of Avengers: Endgame sees Steve Rogers using Pym Particles to return the Infinity Stones to their rightful places in the timeline.

What is the theory behind time travel in Endgame?

If the Avengers change something in the past, they create a parallel timeline Time travel in Avengers: Endgame is based on a popular time travel theory in the field of quantum physics. At one point, Iron Man even drops the name David Deutsch — that’s the guy who came up with the “Many Worlds Theory” or “Multiverse Theory.”

How did Steve Rogers change the timeline?

By merely existing in the timeline, Rogers changed it. Even having a family would alter the timeline, as the children of Steve Rogers would likely, after being raised by Rogers and Carter, would go on to do something that might have even a minor effect on the timeline.

How do the Avengers create a parallel timeline in Endgame?

If the Avengers change something in the past, they create a parallel timeline. Time travel in Avengers: Endgame is based on a popular time travel theory in the field of quantum physics.