Imagine every current man made problem in the world got worse. Dystopia arrives. Then a time travel device is invented. However, just as soon as the research is completed, a prototype is stolen by a team of disrupters.
These disrupters see themselves as heroes. The corporations want to keep the research, and the government wants to clamp down on paradoxes and keep history the same. The disrupters on the other hand, have a mission. Change everything.
What I have a problem with is isolating which events in the history of invention they might select. As I understand it, the history of invention is not a series of Eureka moments, rather a chain of events over disparate time periods. One person does research in one location, and another does the same. They read a paper or see a missing piece of a puzzle, and over time the knowledge slowly accumulates to make a breakthrough. However, this world depends on cherry picking certain moments of discovery.
If you were a enlisted in an organization bent on overturning human historical accomplishment, how would you plot your navigation in terms of destination points? Let us say you had a unibomber type manifesto, and believed that by undoing certain actions you could prevent human kind from arriving at certain technology related predicaments, what events might you undo?