My character is a woman obsessed with a long dead public figure (who died over a century before her birth). She is also brilliant and works in quantom physics, and I think you get where I'm going with that. Her entire life was dedicated to learn of that person on her spare time and also to work on an ambitious project of time travel / parallel universe project. She's not leading it. She's just a kog in the machine, but works her way up to an important position. I need to build a scenario in which she takes the machine over and is undisturbed by any authorities or anything like that. One scenario I had in mind is a disintegration of her country. Chaos and anarchy etc. Stuff that happens unrelated to the rest of the plot, but simply explains why she can sit alone in a bunker (after killing all of her colleagues) without any police or military or government coming to check up on her. If you have any other questions or ideas, feel free to share. Oh, and btw, no paradoxes, as this is a reality where the different eras exist parallel to one another. She will never change the past of her own world, but she could do it with other worlds that are experiencing earlier eras.