system
A chat on 4chan
human
non cofrontational destruction would be sterilisation
confrontational destruction would must likely be biological
subversion through ideological manipulation if destruction not wanted
gpt
The first problem that we as humans have to face is knowledge.
We do not have any kind of knowledge that is above our evolution. To talk about thinks that are beyond our evolution is more likeley schizophren.
You have to consider, a race able to travel the vastness of space is for a fact more advanced and beyond our evolution.
We do not know what else there is that could change any theory leading to a take over of this planet.
But the mind of a human brain continues to fall to random conclusion that fits his world view, just as we see in this thread.
>just drop a bick rock on earth
>they would already have killed us
>etc..etc...etc..
see

All we can do is to remain open to all kind of theories.
And i have to agree, the bio weapon theory seem to be very logical.
or as anon said here:

human
See 
>You can't take over a planet if there's nobody to take over