I think about this a lot. I think that there are many chances for the world to end in our lifetimes.
The western world and culture is collapsing for many many reasons, one of them the extreme and exponentially growing sexual inequality. We are closer and closer to total revolution,
Ecological disasters are more probable than ever, there is an incredible variety of lethal disasters that could happen in a matter or days.
Humans now have nuclear weapons, so accidents or computer viruses can end humanity in just some hours.
The geopolitical balance of power stablished after the second world war is coming to an end, and China and Russia are going to try to become the next global empire. A third world war could easily end with human extinction.
Sciences and technology are advancing faster than ever, making a colossal mistake (like randomly creating an unknown particle that destroys half of the planet in a particle accelerator) more probable than ever
Also, we have the random cosmic cataclysm always waiting, like a meteorite that ends up life on earth, a planet or star that comes close to the solar system and expels the planets from their orbits into the void or a new true quantum vacuum that destroys literally everything in less than a second ().
Anyway, this universe is condemned to die and be forgotten. Even if it doesnt happen while we are alive:
So, one day, it will be literally physically impossible for any concious being to be ugly, to mock an ugly being, to feel rejecter or to remember any of those things if they happened in the past. True peace.