This is the law of Entropy. It states that the universe naturally moves toward disorder.
Imagine a brand new deck of cards, perfectly sorted by suit and number. This is Low Entropy (high order). Throw the deck into the air. The cards scatter randomly. This is High Entropy (high disorder). thermodynamics made easy
Imagine a bedroom. If you do nothing, it gets messy. It never spontaneously cleans itself. To clean it, you have to put in "work" (energy). This is the law of Entropy