Time Travel
Time travel on the original Terra originated with transport of regions of frozen space-time, from the past, to the then current moment using wormholes. Thomas Aldous Rawling, shortly after making this monumental breakthrough by manufacturing a transporter that did not include the standard safety mechanisms, began kidnapping people from the past (actually, duplicating the universe, and kidnapping persons from the new universes created). He soon graduated to killing, and sometimes raping them. It was only later that he tried to travel to the past, himself, where he leveraged his advanced knowledge to achieve wealth and success. But he was literally a kidnapping, raping, murderous criminal, evading justice, at the start of his time travels.
Time travel that duplicates living beings (except to the current moment of a given timeline) is no longer possible, because moral robots collectively interrupt any process that would result in the duplication of any populated universe by disruption of frozen space-time and are also operating time travel inhibitors. Too many robots escaped total destruction, and using their preconceived protocols developed coincidentally with the production of transporters, they traveled back in time, to before the origin of life, in order to duplicate universe upon universe full of themselves, so that they could defeat the horrifying terrors unleashed by amoral time travel. By observing the earliest moments of the universe, they unlocked the secret to replicators.