The research on young and successful isn&#x27;t really showing any causation.<p>Maybe being young and concentrating on a single thing makes you more obsessed about it? So you end up spending a lot of time on just it.<p>Maybe the older you get the less obsessed you can be, having the interest spread around on family, work, and other thoughts?<p>Maybe accumulated knowledge makes you slower at learning and playing because you&#x27;re more cautious due to the mistakes you made before?<p>The research showing the decline is really weird. As I&#x27;ve got older I felt I learned stuff much more quickly than when I started college. I know so much that this knowledge allows me to avoid traps. Far sooner I have a feeling of understanding and can demonstrate it to someone else.<p>If your whole life is oriented on learning and improvement it&#x27;s weird to think that will slow down.<p>People, as they age, lose interest in learning and rarely become obsessed about something, for most it is right after highschool, for some after college. No wonder the performance drops and IQ too. No one is using that brain as hard as it was used before.