Entropy.
Things just get worse until it fails. Dies. Then it decays, then it disappears into the ground.
Only two creatures on the planet repair things. Humans and Beavers. A cat knocks a chair down, and it will never, ever pick it up. The natural tendency of.. well.. nature is to fall down.
We’re losing that humanity, and we’ve stopped repairing things. Only one thing is left - it will all die and need to be reborn.
Well, termites do repair their mounds if an aardvark breaks in.