system
Given the following post, respond as if you're commenting on Reddit:
human
[Men In Black] How did humans survive previous alien invasion when we didn't have technology (pre-20th century) and why do aliens just now abide by Earth's/MIB's laws?
gpt
Earth is a galactic backwater. Until the 1950s when the first group of refugees showed up there weren't any aliens bothering to come to Earth.

The reason that the first group showed up was that they were looking for a backwater planet to use as a galactic Casablanca. So prior to the 1950s alien invasions weren't an issue since Earth had nothing of value and was to far out in the unfashionable end of the western spiral arm to bother visiting.