I just finished a book that answered some questions in the post above and many unanswered ones for years.
I thought to understand human behavior what we need to study is psychology and economic.
Those two might help us to understand the behaviors, but after reading this book, the foundation of understanding all human behavior lies in studying Quantum Physics.
Furthermore, it even helped me to understand one of the most difficult chapters in six pillars of faith, Qada and Qadr.
I have always been a polygamous reader who read a lot and anything. But, this is the first time a book about physics is really captivating until I keep returning to some pages and made me doing long inhale exhale and stare after finishing it.
The joy of being a reader : one book always leads you to many others.
A Penny for My Pensieve 