Why is it human nature to be ARROGANT? ! ?

Often sharing their lives (they just had a baby and now they want to show the world through their videos and vlogs on YouTube? ! ) Or they just got maried, divorced, bought a new car, a new house, a new job, etc etc. etc. It's always ABOUT THEM and their lives! !

Why do people get SO MUCH VALIDATION from the approval of strangers? ! I mean some people tell me on Quora NOT to do that and to try to be strong, but I just want to know!

Why is it human nature to be ARROGANT? ! ?
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