@aral wouldn't that be like trying to stop the wind with your hands? Did colonialism not stem from what were other practices in existence since the dawn of mankind? How was colonialism different from the land conquest enacted by Huns and Mongols? Did the concept of empire not exist way before what we call colonialism? Think Romans, Aztecs, Mayans, Turks, and so on. Who would you exactly kill or lock in a box and throw the key away to prevent colonialism? Maybe the first human?

@Disputatore @aral There are some really obvious, named people to take out to avoid the worst horrors of genocide/colonialism, some named ships to sink, some named battles to sway or stop.
We know a lot of history from a lot of the world and there's no problem pinpointing a lot of worst contacts.
So trying the "we're the virus" rhetoric on a damn hypothetical thought experiment just showed you're enthusiastically comfortable with the status quo.