The primary cause of a spoiled child is permissive parenting, where a lack of discipline and boundaries results in self-centered and immature behavior. The American Academy of Pediatrics notes that such children are often overindulged and display traits like selfishness and narcissism. Parents may avoid setting rules for various reasons, such as wanting to please their children, ensuring pleasant outings, or compensating for time spent away due to work or social activities. While occasional treats are fine, consistently giving in to a child’s demands can lead to spoiled behavior. The goal should be to reinforce good behavior rather than rewarding bad behavior.
https://parents.com/parenting/better-parenting/style/un-spoil-your-kid
