Who would win: humanity, or the rats?
One day, every single rat on earth suddenly changes. They are all now part of a hive mind, capable of communicating with any and all other rats in the world instantaneously. They have massively increased intelligence, approximately equalling the brainpower and general understanding of human society that an average human adult has. Their physical strength, size, number, location, etc. have not changed, just their minds. These new rats are determined to kill every last human on the planet, and will stop at nothing to do so.
If the rats manage to make humanity go extinct or force us off of the planet, they win.
If humanity manages to survive indefinitely, then we win.
A couple things to note:
- Humanity does not initially know what has happened to the rats. They will have to figure out the changes through observing the rats.
- The rats are patient and self-sacrificing. All that matters to them is that humanity is destroyed, be it tomorrow or in a thousand years. Any individual rat would be willing to end its own life if it would further the greater cause of all rats.
- An example of the "general understanding of human society that an average human adult has" would be, for instance, they would know that countries usually have some kind of appointed leader who is "in charge" in some kind of manner. They would not inherently understand the exact, specific chain of command of world leaders, or their precise location, or the information that heads of state are privy to. All of these things would have to be deduced by the rats through their observations. The rats can also understand human speech/writing.
- It is estimated that there are about seven billion rats on earth currently.