When do most intellectuals write their first book?

[Rasheed]

When do most intellectuals write their first book? I googled it and found that for example Jordan Peterson, Richard Dawkins, Sam Harris all wrote their first book in late 30s...

So, let's say individuals wants to write a serious book about psychology/philosophy, at least he/she should be in my mid 30's to do it? 

[Phil King]

When they are well informed enough and have gained enough knowledge and experience to provide value to a reader. There is no age requirement. The guy in ur profile pic, Cal Newport, wrote his first book when he was like 22. 

Edited October 30, 2022 by Phil King

[aurum]

21 hours ago, Rasheed said:

So, let's say individuals wants to write a serious book about psychology/philosophy, at least he/she should be in my mid 30's to do it? 

They should actually have something serious to say and have put in a ton of work into researching and writing it. You can do that technically at any age. But for most people it will probably take until their 30s or even later.

[Max_V]

Though age can definitely be a something that denotes wisdom and life experience, it is only like a guideline. If you are competent and feel like you have something valuable to say at, lets say 23, don’t hold yourself back just because you don’t meet some generally adviced number.