Life will find a way. Going back can be used to create nuclear winter but even then, life will go on.
To completely screw over the world, I would go into the future and acquire the source code for a general AI.
Then the world can be locked down and robots can be built to abuse every human and sentinent being individually, for a very long time.
Life will find a way. Going back can be used to create nuclear winter but even then, life will go on.
To completely screw over the world, I would go into the future and acquire the source code for a general AI.
Then the world can be locked down and robots can be built to abuse every human and sentinent being individually, for a very long time.